/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/popl20-more/dot-product.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 06:29:21,778 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 06:29:21,780 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 06:29:21,808 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 06:29:21,856 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 06:29:21,882 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 06:29:21,882 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 06:29:21,883 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 06:29:21,883 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 06:29:21,885 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 06:29:21,885 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 06:29:21,885 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 06:29:21,885 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 06:29:21,885 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 06:29:21,885 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 06:29:21,886 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 06:29:21,886 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 06:29:21,886 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 06:29:21,886 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 06:29:21,886 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 06:29:21,886 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 06:29:21,886 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 06:29:21,886 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 06:29:21,886 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 06:29:21,887 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 06:29:21,887 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 06:29:21,887 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 06:29:21,887 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 06:29:21,887 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 06:29:21,887 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 06:29:21,887 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 06:29:21,887 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 06:29:21,888 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 06:29:21,888 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 06:29:21,888 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 06:29:21,888 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 06:29:21,888 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 06:29:22,139 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 06:29:22,152 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 06:29:22,153 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 06:29:22,154 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 06:29:22,155 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 06:29:22,156 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/dot-product.wvr.bpl [2021-06-05 06:29:22,156 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/dot-product.wvr.bpl' [2021-06-05 06:29:22,188 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 06:29:22,189 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 06:29:22,194 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 06:29:22,194 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 06:29:22,194 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 06:29:22,202 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "dot-product.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:29:22" (1/1) ... [2021-06-05 06:29:22,209 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "dot-product.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:29:22" (1/1) ... [2021-06-05 06:29:22,214 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 06:29:22,215 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 06:29:22,215 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 06:29:22,215 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 06:29:22,220 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "dot-product.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:29:22" (1/1) ... [2021-06-05 06:29:22,220 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "dot-product.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:29:22" (1/1) ... [2021-06-05 06:29:22,221 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "dot-product.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:29:22" (1/1) ... [2021-06-05 06:29:22,221 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "dot-product.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:29:22" (1/1) ... [2021-06-05 06:29:22,223 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "dot-product.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:29:22" (1/1) ... [2021-06-05 06:29:22,225 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "dot-product.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:29:22" (1/1) ... [2021-06-05 06:29:22,225 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "dot-product.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:29:22" (1/1) ... [2021-06-05 06:29:22,226 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 06:29:22,227 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 06:29:22,227 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 06:29:22,227 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 06:29:22,230 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "dot-product.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:29:22" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 06:29:22,291 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 06:29:22,291 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 06:29:22,291 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 06:29:22,292 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 06:29:22,292 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 06:29:22,292 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 06:29:22,292 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 06:29:22,292 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 06:29:22,292 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 06:29:22,292 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 06:29:22,292 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 06:29:22,292 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 06:29:22,293 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 06:29:22,488 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 06:29:22,489 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 06:29:22,490 INFO L202 PluginConnector]: Adding new model dot-product.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 06:29:22 BoogieIcfgContainer [2021-06-05 06:29:22,490 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 06:29:22,491 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 06:29:22,491 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 06:29:22,493 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 06:29:22,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "dot-product.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:29:22" (1/2) ... [2021-06-05 06:29:22,494 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8185df4 and model type dot-product.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 06:29:22, skipping insertion in model container [2021-06-05 06:29:22,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "dot-product.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 06:29:22" (2/2) ... [2021-06-05 06:29:22,495 INFO L111 eAbstractionObserver]: Analyzing ICFG dot-product.wvr.bpl [2021-06-05 06:29:22,505 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 06:29:22,505 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 06:29:22,505 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 06:29:22,506 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 06:29:22,554 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 06:29:22,575 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 06:29:22,600 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 06:29:22,600 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 06:29:22,600 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 06:29:22,600 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 06:29:22,600 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 06:29:22,600 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 06:29:22,600 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 06:29:22,601 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 06:29:22,610 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2021-06-05 06:29:22,629 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:22,631 INFO L276 IsEmpty]: Start isEmpty. Operand has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:22,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 06:29:22,640 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:29:22,641 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:29:22,641 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:29:22,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:29:22,646 INFO L82 PathProgramCache]: Analyzing trace with hash 201148569, now seen corresponding path program 1 times [2021-06-05 06:29:22,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:29:22,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687755724] [2021-06-05 06:29:22,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:29:22,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:22,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:22,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:29:22,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687755724] [2021-06-05 06:29:22,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687755724] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:29:22,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:29:22,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 06:29:22,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444915961] [2021-06-05 06:29:22,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 06:29:22,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:29:22,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 06:29:22,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 06:29:22,803 INFO L87 Difference]: Start difference. First operand has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 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 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:22,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:29:22,838 INFO L93 Difference]: Finished difference Result 217 states and 617 transitions. [2021-06-05 06:29:22,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 06:29:22,840 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 06:29:22,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:29:22,850 INFO L225 Difference]: With dead ends: 217 [2021-06-05 06:29:22,850 INFO L226 Difference]: Without dead ends: 202 [2021-06-05 06:29:22,851 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 06:29:22,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-06-05 06:29:22,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 149. [2021-06-05 06:29:22,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.831081081081081) internal successors, (419), 148 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:22,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 419 transitions. [2021-06-05 06:29:22,901 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 419 transitions. Word has length 18 [2021-06-05 06:29:22,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:29:22,901 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 419 transitions. [2021-06-05 06:29:22,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:22,901 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 419 transitions. [2021-06-05 06:29:22,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 06:29:22,903 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:29:22,903 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:29:22,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 06:29:22,903 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:29:22,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:29:22,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1603966247, now seen corresponding path program 1 times [2021-06-05 06:29:22,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:29:22,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886313810] [2021-06-05 06:29:22,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:29:22,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:22,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:29:22,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:29:22,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886313810] [2021-06-05 06:29:22,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886313810] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:29:22,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:29:22,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 06:29:22,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167055728] [2021-06-05 06:29:22,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 06:29:22,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:29:22,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 06:29:22,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 06:29:22,936 INFO L87 Difference]: Start difference. First operand 149 states and 419 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:22,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:29:22,986 INFO L93 Difference]: Finished difference Result 158 states and 445 transitions. [2021-06-05 06:29:22,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 06:29:22,987 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 06:29:22,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:29:22,988 INFO L225 Difference]: With dead ends: 158 [2021-06-05 06:29:22,988 INFO L226 Difference]: Without dead ends: 158 [2021-06-05 06:29:22,988 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 06:29:22,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-06-05 06:29:22,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 133. [2021-06-05 06:29:22,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.8333333333333335) internal successors, (374), 132 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:22,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2021-06-05 06:29:22,998 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 20 [2021-06-05 06:29:22,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:29:22,999 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2021-06-05 06:29:22,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:22,999 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2021-06-05 06:29:23,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 06:29:23,000 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:29:23,000 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:29:23,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 06:29:23,000 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:29:23,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:29:23,001 INFO L82 PathProgramCache]: Analyzing trace with hash -895359049, now seen corresponding path program 1 times [2021-06-05 06:29:23,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:29:23,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40856481] [2021-06-05 06:29:23,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:29:23,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:23,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:29:23,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:29:23,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40856481] [2021-06-05 06:29:23,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40856481] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:29:23,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:29:23,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 06:29:23,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19445292] [2021-06-05 06:29:23,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 06:29:23,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:29:23,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 06:29:23,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 06:29:23,057 INFO L87 Difference]: Start difference. First operand 133 states and 374 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:23,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:29:23,124 INFO L93 Difference]: Finished difference Result 183 states and 522 transitions. [2021-06-05 06:29:23,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 06:29:23,125 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 06:29:23,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:29:23,126 INFO L225 Difference]: With dead ends: 183 [2021-06-05 06:29:23,126 INFO L226 Difference]: Without dead ends: 183 [2021-06-05 06:29:23,126 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.1ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 06:29:23,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-06-05 06:29:23,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 158. [2021-06-05 06:29:23,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8535031847133756) internal successors, (448), 157 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:23,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2021-06-05 06:29:23,133 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2021-06-05 06:29:23,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:29:23,134 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2021-06-05 06:29:23,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:23,134 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2021-06-05 06:29:23,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 06:29:23,135 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:29:23,135 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:29:23,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 06:29:23,135 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:29:23,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:29:23,136 INFO L82 PathProgramCache]: Analyzing trace with hash -443909641, now seen corresponding path program 1 times [2021-06-05 06:29:23,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:29:23,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103200797] [2021-06-05 06:29:23,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:29:23,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:23,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:23,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:29:23,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103200797] [2021-06-05 06:29:23,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103200797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:23,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577994966] [2021-06-05 06:29:23,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:23,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:23,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 06:29:23,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:29:23,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:29:23,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-06-05 06:29:23,712 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:29:23,723 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:23,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:29:23,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 06:29:23,730 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:29:23,735 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:23,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 06:29:23,739 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:29:23,743 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:23,749 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:29:23,749 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:29, output treesize:3 [2021-06-05 06:29:23,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:23,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577994966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:23,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:29:23,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 06:29:23,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395571586] [2021-06-05 06:29:23,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:29:23,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:29:23,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:29:23,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:29:23,786 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:23,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:29:23,964 INFO L93 Difference]: Finished difference Result 330 states and 935 transitions. [2021-06-05 06:29:23,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 06:29:23,965 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 06:29:23,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:29:23,967 INFO L225 Difference]: With dead ends: 330 [2021-06-05 06:29:23,967 INFO L226 Difference]: Without dead ends: 315 [2021-06-05 06:29:23,967 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 250.2ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:29:23,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-06-05 06:29:23,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 224. [2021-06-05 06:29:23,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.8699551569506725) internal successors, (640), 223 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:23,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2021-06-05 06:29:23,976 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2021-06-05 06:29:23,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:29:23,977 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2021-06-05 06:29:23,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:23,977 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2021-06-05 06:29:23,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 06:29:23,981 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:29:23,981 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:29:24,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:24,206 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:29:24,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:29:24,206 INFO L82 PathProgramCache]: Analyzing trace with hash -611718733, now seen corresponding path program 2 times [2021-06-05 06:29:24,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:29:24,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231856745] [2021-06-05 06:29:24,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:29:24,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:24,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:24,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:29:24,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231856745] [2021-06-05 06:29:24,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231856745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:24,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244800673] [2021-06-05 06:29:24,360 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:24,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:29:24,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:29:24,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 06:29:24,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:29:24,505 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:24,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2021-06-05 06:29:24,562 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:29:24,572 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:24,584 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:24,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2021-06-05 06:29:24,633 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:29:24,650 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:24,664 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:24,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2021-06-05 06:29:24,667 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 06:29:24,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:24,726 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:29:24,726 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:32, output treesize:19 [2021-06-05 06:29:24,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:24,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244800673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:24,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:29:24,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-06-05 06:29:24,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603766325] [2021-06-05 06:29:24,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:29:24,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:29:24,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:29:24,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:29:24,779 INFO L87 Difference]: Start difference. First operand 224 states and 640 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:25,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:29:25,073 INFO L93 Difference]: Finished difference Result 374 states and 1077 transitions. [2021-06-05 06:29:25,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 06:29:25,073 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) 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 22 [2021-06-05 06:29:25,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:29:25,075 INFO L225 Difference]: With dead ends: 374 [2021-06-05 06:29:25,075 INFO L226 Difference]: Without dead ends: 359 [2021-06-05 06:29:25,075 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 323.7ms TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:29:25,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-06-05 06:29:25,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 229. [2021-06-05 06:29:25,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.912280701754386) internal successors, (664), 228 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:25,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2021-06-05 06:29:25,082 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2021-06-05 06:29:25,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:29:25,083 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2021-06-05 06:29:25,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:25,083 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2021-06-05 06:29:25,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 06:29:25,083 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:29:25,084 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:29:25,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:25,302 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:29:25,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:29:25,302 INFO L82 PathProgramCache]: Analyzing trace with hash -312945285, now seen corresponding path program 3 times [2021-06-05 06:29:25,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:29:25,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807223731] [2021-06-05 06:29:25,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:29:25,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:25,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:25,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:29:25,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807223731] [2021-06-05 06:29:25,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807223731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:25,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600395556] [2021-06-05 06:29:25,433 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:25,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 06:29:25,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:29:25,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 06:29:25,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:29:25,549 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 23 treesize of output 19 [2021-06-05 06:29:25,553 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:29:25,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:25,559 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 19 treesize of output 15 [2021-06-05 06:29:25,562 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:29:25,566 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:25,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 06:29:25,569 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:29:25,572 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:25,574 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:29:25,574 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:31, output treesize:3 [2021-06-05 06:29:25,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:25,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600395556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:25,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:29:25,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 06:29:25,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677079363] [2021-06-05 06:29:25,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:29:25,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:29:25,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:29:25,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:29:25,600 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:25,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:29:25,732 INFO L93 Difference]: Finished difference Result 363 states and 1038 transitions. [2021-06-05 06:29:25,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 06:29:25,733 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 06:29:25,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:29:25,735 INFO L225 Difference]: With dead ends: 363 [2021-06-05 06:29:25,735 INFO L226 Difference]: Without dead ends: 348 [2021-06-05 06:29:25,737 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 158.4ms TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:29:25,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-06-05 06:29:25,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 241. [2021-06-05 06:29:25,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.8916666666666666) internal successors, (694), 240 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:25,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2021-06-05 06:29:25,745 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2021-06-05 06:29:25,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:29:25,746 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2021-06-05 06:29:25,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:25,746 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2021-06-05 06:29:25,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 06:29:25,747 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:29:25,747 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:29:25,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-05 06:29:25,957 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:29:25,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:29:25,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1257880315, now seen corresponding path program 4 times [2021-06-05 06:29:25,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:29:25,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039127313] [2021-06-05 06:29:25,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:29:25,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:26,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:26,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:29:26,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039127313] [2021-06-05 06:29:26,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039127313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:26,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026300374] [2021-06-05 06:29:26,065 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:26,093 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:29:26,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:29:26,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 06:29:26,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:29:26,175 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:26,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2021-06-05 06:29:26,200 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:29:26,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:26,215 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:26,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2021-06-05 06:29:26,246 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:29:26,259 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:26,274 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:26,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2021-06-05 06:29:26,277 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 06:29:26,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:26,318 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:29:26,318 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:34, output treesize:19 [2021-06-05 06:29:26,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:26,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026300374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:26,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:29:26,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 06:29:26,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242975489] [2021-06-05 06:29:26,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:29:26,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:29:26,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:29:26,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:29:26,367 INFO L87 Difference]: Start difference. First operand 241 states and 694 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:26,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:29:26,543 INFO L93 Difference]: Finished difference Result 425 states and 1233 transitions. [2021-06-05 06:29:26,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 06:29:26,543 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 06:29:26,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:29:26,545 INFO L225 Difference]: With dead ends: 425 [2021-06-05 06:29:26,545 INFO L226 Difference]: Without dead ends: 410 [2021-06-05 06:29:26,546 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 187.5ms TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:29:26,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-06-05 06:29:26,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 247. [2021-06-05 06:29:26,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.9186991869918697) internal successors, (718), 246 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:26,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2021-06-05 06:29:26,551 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2021-06-05 06:29:26,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:29:26,551 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2021-06-05 06:29:26,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:26,552 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2021-06-05 06:29:26,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:29:26,552 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:29:26,552 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:29:26,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:26,769 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:29:26,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:29:26,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1884155861, now seen corresponding path program 5 times [2021-06-05 06:29:26,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:29:26,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973480123] [2021-06-05 06:29:26,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:29:26,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:26,807 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:26,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:29:26,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973480123] [2021-06-05 06:29:26,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973480123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:26,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541092169] [2021-06-05 06:29:26,807 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:26,861 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:29:26,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:29:26,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:29:26,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:29:26,926 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:26,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541092169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:26,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:29:26,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 06:29:26,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53112140] [2021-06-05 06:29:26,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:29:26,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:29:26,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:29:26,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:29:26,927 INFO L87 Difference]: Start difference. First operand 247 states and 718 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:27,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:29:27,249 INFO L93 Difference]: Finished difference Result 619 states and 1783 transitions. [2021-06-05 06:29:27,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 06:29:27,250 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:29:27,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:29:27,252 INFO L225 Difference]: With dead ends: 619 [2021-06-05 06:29:27,252 INFO L226 Difference]: Without dead ends: 619 [2021-06-05 06:29:27,253 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 193.0ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:29:27,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-06-05 06:29:27,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 297. [2021-06-05 06:29:27,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.050675675675676) internal successors, (903), 296 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:27,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 903 transitions. [2021-06-05 06:29:27,259 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 903 transitions. Word has length 24 [2021-06-05 06:29:27,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:29:27,260 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 903 transitions. [2021-06-05 06:29:27,260 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:27,260 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 903 transitions. [2021-06-05 06:29:27,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:29:27,260 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:29:27,260 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:29:27,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:27,478 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:29:27,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:29:27,478 INFO L82 PathProgramCache]: Analyzing trace with hash 907837017, now seen corresponding path program 6 times [2021-06-05 06:29:27,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:29:27,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564376183] [2021-06-05 06:29:27,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:29:27,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:27,524 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:27,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:29:27,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564376183] [2021-06-05 06:29:27,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564376183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:27,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399510431] [2021-06-05 06:29:27,525 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:27,548 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:29:27,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:29:27,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:29:27,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:29:27,617 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:27,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399510431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:27,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:29:27,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 06:29:27,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854845711] [2021-06-05 06:29:27,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:29:27,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:29:27,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:29:27,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:29:27,619 INFO L87 Difference]: Start difference. First operand 297 states and 903 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:28,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:29:28,304 INFO L93 Difference]: Finished difference Result 1078 states and 2992 transitions. [2021-06-05 06:29:28,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 06:29:28,305 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:29:28,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:29:28,308 INFO L225 Difference]: With dead ends: 1078 [2021-06-05 06:29:28,309 INFO L226 Difference]: Without dead ends: 1078 [2021-06-05 06:29:28,309 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 431.9ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 06:29:28,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-06-05 06:29:28,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 302. [2021-06-05 06:29:28,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.083056478405316) internal successors, (928), 301 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:28,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 928 transitions. [2021-06-05 06:29:28,319 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 928 transitions. Word has length 24 [2021-06-05 06:29:28,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:29:28,320 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 928 transitions. [2021-06-05 06:29:28,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:28,320 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 928 transitions. [2021-06-05 06:29:28,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:29:28,320 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:29:28,320 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:29:28,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:28,538 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:29:28,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:29:28,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1474789097, now seen corresponding path program 7 times [2021-06-05 06:29:28,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:29:28,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166931561] [2021-06-05 06:29:28,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:29:28,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:28,591 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:28,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:29:28,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166931561] [2021-06-05 06:29:28,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166931561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:28,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578278319] [2021-06-05 06:29:28,607 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:28,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:28,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:29:28,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:29:28,720 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:28,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578278319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:28,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:29:28,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 06:29:28,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667479051] [2021-06-05 06:29:28,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:29:28,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:29:28,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:29:28,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:29:28,724 INFO L87 Difference]: Start difference. First operand 302 states and 928 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:29,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:29:29,369 INFO L93 Difference]: Finished difference Result 951 states and 2692 transitions. [2021-06-05 06:29:29,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 06:29:29,369 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:29:29,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:29:29,373 INFO L225 Difference]: With dead ends: 951 [2021-06-05 06:29:29,373 INFO L226 Difference]: Without dead ends: 951 [2021-06-05 06:29:29,373 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 417.2ms TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 06:29:29,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-06-05 06:29:29,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 293. [2021-06-05 06:29:29,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 3.0616438356164384) internal successors, (894), 292 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:29,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 894 transitions. [2021-06-05 06:29:29,383 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 894 transitions. Word has length 24 [2021-06-05 06:29:29,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:29:29,384 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 894 transitions. [2021-06-05 06:29:29,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:29,384 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 894 transitions. [2021-06-05 06:29:29,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:29:29,384 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:29:29,384 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:29:29,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:29,601 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:29:29,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:29:29,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1884039527, now seen corresponding path program 1 times [2021-06-05 06:29:29,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:29:29,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379216148] [2021-06-05 06:29:29,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:29:29,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:29,623 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:29:29,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:29:29,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379216148] [2021-06-05 06:29:29,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379216148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:29,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452665767] [2021-06-05 06:29:29,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:29,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:29,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 06:29:29,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:29:29,702 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:29:29,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452665767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:29,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:29:29,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 06:29:29,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974968575] [2021-06-05 06:29:29,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 06:29:29,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:29:29,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 06:29:29,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 06:29:29,705 INFO L87 Difference]: Start difference. First operand 293 states and 894 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:29,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:29:29,788 INFO L93 Difference]: Finished difference Result 669 states and 1943 transitions. [2021-06-05 06:29:29,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 06:29:29,788 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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 24 [2021-06-05 06:29:29,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:29:29,792 INFO L225 Difference]: With dead ends: 669 [2021-06-05 06:29:29,792 INFO L226 Difference]: Without dead ends: 663 [2021-06-05 06:29:29,793 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 48.0ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:29:29,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-06-05 06:29:29,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 413. [2021-06-05 06:29:29,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 3.1699029126213594) internal successors, (1306), 412 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:29,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1306 transitions. [2021-06-05 06:29:29,802 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1306 transitions. Word has length 24 [2021-06-05 06:29:29,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:29:29,802 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 1306 transitions. [2021-06-05 06:29:29,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:29,802 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1306 transitions. [2021-06-05 06:29:29,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:29:29,804 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:29:29,804 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:29:30,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-06-05 06:29:30,017 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:29:30,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:29:30,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1973959061, now seen corresponding path program 8 times [2021-06-05 06:29:30,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:29:30,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708046372] [2021-06-05 06:29:30,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:29:30,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:30,054 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:30,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:29:30,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708046372] [2021-06-05 06:29:30,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708046372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:30,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245180548] [2021-06-05 06:29:30,054 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 06:29:30,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:29:30,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:29:30,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:29:30,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:30,169 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:30,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245180548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:30,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:29:30,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 06:29:30,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99684347] [2021-06-05 06:29:30,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:29:30,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:29:30,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:29:30,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:29:30,170 INFO L87 Difference]: Start difference. First operand 413 states and 1306 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:30,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:29:30,324 INFO L93 Difference]: Finished difference Result 710 states and 2124 transitions. [2021-06-05 06:29:30,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:29:30,325 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:29:30,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:29:30,327 INFO L225 Difference]: With dead ends: 710 [2021-06-05 06:29:30,327 INFO L226 Difference]: Without dead ends: 672 [2021-06-05 06:29:30,327 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 125.5ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:29:30,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-06-05 06:29:30,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 515. [2021-06-05 06:29:30,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 3.17704280155642) internal successors, (1633), 514 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:30,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1633 transitions. [2021-06-05 06:29:30,340 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1633 transitions. Word has length 24 [2021-06-05 06:29:30,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:29:30,340 INFO L482 AbstractCegarLoop]: Abstraction has 515 states and 1633 transitions. [2021-06-05 06:29:30,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:30,340 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1633 transitions. [2021-06-05 06:29:30,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:29:30,341 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:29:30,341 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:29:30,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:30,556 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:29:30,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:29:30,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1268001729, now seen corresponding path program 2 times [2021-06-05 06:29:30,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:29:30,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84773037] [2021-06-05 06:29:30,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:29:30,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:30,597 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:29:30,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:29:30,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84773037] [2021-06-05 06:29:30,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84773037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:30,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146488694] [2021-06-05 06:29:30,598 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 06:29:30,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:29:30,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:29:30,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:30,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:29:30,673 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:29:30,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146488694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:30,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:29:30,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 06:29:30,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764036208] [2021-06-05 06:29:30,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 06:29:30,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:29:30,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 06:29:30,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 06:29:30,674 INFO L87 Difference]: Start difference. First operand 515 states and 1633 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:30,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:29:30,759 INFO L93 Difference]: Finished difference Result 830 states and 2453 transitions. [2021-06-05 06:29:30,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 06:29:30,759 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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 24 [2021-06-05 06:29:30,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:29:30,762 INFO L225 Difference]: With dead ends: 830 [2021-06-05 06:29:30,762 INFO L226 Difference]: Without dead ends: 830 [2021-06-05 06:29:30,762 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 55.2ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:29:30,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-06-05 06:29:30,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 530. [2021-06-05 06:29:30,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 529 states have (on average 3.153119092627599) internal successors, (1668), 529 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:30,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1668 transitions. [2021-06-05 06:29:30,774 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1668 transitions. Word has length 24 [2021-06-05 06:29:30,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:29:30,775 INFO L482 AbstractCegarLoop]: Abstraction has 530 states and 1668 transitions. [2021-06-05 06:29:30,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:30,775 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1668 transitions. [2021-06-05 06:29:30,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:29:30,776 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:29:30,776 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:29:30,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:30,994 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:29:30,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:29:30,994 INFO L82 PathProgramCache]: Analyzing trace with hash -78679837, now seen corresponding path program 9 times [2021-06-05 06:29:30,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:29:30,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908368560] [2021-06-05 06:29:30,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:29:30,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:31,036 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:31,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:29:31,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908368560] [2021-06-05 06:29:31,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908368560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:31,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169226079] [2021-06-05 06:29:31,037 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:31,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:29:31,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:29:31,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:29:31,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:29:31,141 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:31,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169226079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:31,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:29:31,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 06:29:31,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124709413] [2021-06-05 06:29:31,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:29:31,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:29:31,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:29:31,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:29:31,143 INFO L87 Difference]: Start difference. First operand 530 states and 1668 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:31,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:29:31,395 INFO L93 Difference]: Finished difference Result 1196 states and 3492 transitions. [2021-06-05 06:29:31,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 06:29:31,397 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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 24 [2021-06-05 06:29:31,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:29:31,401 INFO L225 Difference]: With dead ends: 1196 [2021-06-05 06:29:31,401 INFO L226 Difference]: Without dead ends: 1196 [2021-06-05 06:29:31,402 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 162.3ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:29:31,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-06-05 06:29:31,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 542. [2021-06-05 06:29:31,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 3.1497227356746764) internal successors, (1704), 541 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:31,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1704 transitions. [2021-06-05 06:29:31,415 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1704 transitions. Word has length 24 [2021-06-05 06:29:31,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:29:31,416 INFO L482 AbstractCegarLoop]: Abstraction has 542 states and 1704 transitions. [2021-06-05 06:29:31,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:31,416 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1704 transitions. [2021-06-05 06:29:31,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:29:31,417 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:29:31,417 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:29:31,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-05 06:29:31,632 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:29:31,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:29:31,633 INFO L82 PathProgramCache]: Analyzing trace with hash 706234257, now seen corresponding path program 10 times [2021-06-05 06:29:31,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:29:31,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543808840] [2021-06-05 06:29:31,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:29:31,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:31,673 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:31,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:29:31,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543808840] [2021-06-05 06:29:31,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543808840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:31,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288759014] [2021-06-05 06:29:31,674 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:31,714 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:29:31,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:29:31,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:29:31,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:29:31,779 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:31,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288759014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:31,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:29:31,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 06:29:31,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706214487] [2021-06-05 06:29:31,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:29:31,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:29:31,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:29:31,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:29:31,780 INFO L87 Difference]: Start difference. First operand 542 states and 1704 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:32,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:29:32,147 INFO L93 Difference]: Finished difference Result 1492 states and 4245 transitions. [2021-06-05 06:29:32,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 06:29:32,147 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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 24 [2021-06-05 06:29:32,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:29:32,152 INFO L225 Difference]: With dead ends: 1492 [2021-06-05 06:29:32,152 INFO L226 Difference]: Without dead ends: 1492 [2021-06-05 06:29:32,153 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 215.1ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 06:29:32,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-06-05 06:29:32,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 586. [2021-06-05 06:29:32,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 3.1555555555555554) internal successors, (1846), 585 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:32,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1846 transitions. [2021-06-05 06:29:32,168 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1846 transitions. Word has length 24 [2021-06-05 06:29:32,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:29:32,168 INFO L482 AbstractCegarLoop]: Abstraction has 586 states and 1846 transitions. [2021-06-05 06:29:32,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:32,168 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1846 transitions. [2021-06-05 06:29:32,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:29:32,169 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:29:32,169 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:29:32,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-05 06:29:32,387 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:29:32,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:29:32,387 INFO L82 PathProgramCache]: Analyzing trace with hash -376788399, now seen corresponding path program 11 times [2021-06-05 06:29:32,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:29:32,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771137750] [2021-06-05 06:29:32,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:29:32,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:32,417 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:32,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:29:32,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771137750] [2021-06-05 06:29:32,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771137750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:32,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837813661] [2021-06-05 06:29:32,417 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:32,440 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:29:32,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:29:32,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:29:32,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:29:32,525 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:32,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837813661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:32,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:29:32,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 06:29:32,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415850862] [2021-06-05 06:29:32,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:29:32,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:29:32,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:29:32,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:29:32,526 INFO L87 Difference]: Start difference. First operand 586 states and 1846 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:32,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:29:32,736 INFO L93 Difference]: Finished difference Result 1258 states and 3765 transitions. [2021-06-05 06:29:32,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:29:32,736 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:29:32,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:29:32,741 INFO L225 Difference]: With dead ends: 1258 [2021-06-05 06:29:32,741 INFO L226 Difference]: Without dead ends: 1248 [2021-06-05 06:29:32,741 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 141.5ms TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:29:32,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-06-05 06:29:32,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 758. [2021-06-05 06:29:32,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 3.224570673712021) internal successors, (2441), 757 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:32,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2441 transitions. [2021-06-05 06:29:32,757 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2441 transitions. Word has length 24 [2021-06-05 06:29:32,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:29:32,757 INFO L482 AbstractCegarLoop]: Abstraction has 758 states and 2441 transitions. [2021-06-05 06:29:32,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:32,757 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2441 transitions. [2021-06-05 06:29:32,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:29:32,759 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:29:32,759 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:29:32,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 06:29:32,975 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:29:32,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:29:32,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1094289719, now seen corresponding path program 12 times [2021-06-05 06:29:32,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:29:32,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656921885] [2021-06-05 06:29:32,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:29:32,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:33,005 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:33,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:29:33,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656921885] [2021-06-05 06:29:33,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656921885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:33,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040758008] [2021-06-05 06:29:33,005 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:33,038 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:29:33,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:29:33,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:29:33,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:29:33,099 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:33,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040758008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:33,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:29:33,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 06:29:33,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263526034] [2021-06-05 06:29:33,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:29:33,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:29:33,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:29:33,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:29:33,100 INFO L87 Difference]: Start difference. First operand 758 states and 2441 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:33,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:29:33,333 INFO L93 Difference]: Finished difference Result 1329 states and 4025 transitions. [2021-06-05 06:29:33,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 06:29:33,334 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:29:33,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:29:33,338 INFO L225 Difference]: With dead ends: 1329 [2021-06-05 06:29:33,338 INFO L226 Difference]: Without dead ends: 1329 [2021-06-05 06:29:33,338 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 159.1ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:29:33,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-06-05 06:29:33,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 764. [2021-06-05 06:29:33,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 3.220183486238532) internal successors, (2457), 763 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:33,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2457 transitions. [2021-06-05 06:29:33,354 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2457 transitions. Word has length 24 [2021-06-05 06:29:33,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:29:33,354 INFO L482 AbstractCegarLoop]: Abstraction has 764 states and 2457 transitions. [2021-06-05 06:29:33,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:33,354 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2457 transitions. [2021-06-05 06:29:33,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:29:33,356 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:29:33,356 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:29:33,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:33,569 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:29:33,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:29:33,569 INFO L82 PathProgramCache]: Analyzing trace with hash 661413115, now seen corresponding path program 13 times [2021-06-05 06:29:33,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:29:33,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889610783] [2021-06-05 06:29:33,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:29:33,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:33,605 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:33,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:29:33,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889610783] [2021-06-05 06:29:33,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889610783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:33,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720925285] [2021-06-05 06:29:33,605 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:33,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:33,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:29:33,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:29:33,679 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:33,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720925285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:33,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:29:33,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 06:29:33,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983560629] [2021-06-05 06:29:33,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:29:33,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:29:33,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:29:33,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:29:33,680 INFO L87 Difference]: Start difference. First operand 764 states and 2457 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:33,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:29:33,986 INFO L93 Difference]: Finished difference Result 1548 states and 4638 transitions. [2021-06-05 06:29:33,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:29:33,986 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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 24 [2021-06-05 06:29:33,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:29:33,991 INFO L225 Difference]: With dead ends: 1548 [2021-06-05 06:29:33,991 INFO L226 Difference]: Without dead ends: 1544 [2021-06-05 06:29:33,992 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 189.3ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:29:33,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-06-05 06:29:34,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 772. [2021-06-05 06:29:34,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 3.204928664072633) internal successors, (2471), 771 states have internal predecessors, (2471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:34,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2471 transitions. [2021-06-05 06:29:34,011 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2471 transitions. Word has length 24 [2021-06-05 06:29:34,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:29:34,011 INFO L482 AbstractCegarLoop]: Abstraction has 772 states and 2471 transitions. [2021-06-05 06:29:34,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:34,011 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2471 transitions. [2021-06-05 06:29:34,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:29:34,013 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:29:34,013 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:29:34,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:34,229 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:29:34,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:29:34,229 INFO L82 PathProgramCache]: Analyzing trace with hash 389403925, now seen corresponding path program 14 times [2021-06-05 06:29:34,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:29:34,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492877298] [2021-06-05 06:29:34,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:29:34,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:34,266 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:34,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:29:34,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492877298] [2021-06-05 06:29:34,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492877298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:34,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154960837] [2021-06-05 06:29:34,267 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:34,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:29:34,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:29:34,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:29:34,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:29:34,382 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:34,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154960837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:34,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:29:34,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 06:29:34,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711966658] [2021-06-05 06:29:34,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:29:34,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:29:34,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:29:34,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:29:34,383 INFO L87 Difference]: Start difference. First operand 772 states and 2471 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:35,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:29:35,043 INFO L93 Difference]: Finished difference Result 2734 states and 8136 transitions. [2021-06-05 06:29:35,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 06:29:35,043 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:29:35,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:29:35,053 INFO L225 Difference]: With dead ends: 2734 [2021-06-05 06:29:35,053 INFO L226 Difference]: Without dead ends: 2734 [2021-06-05 06:29:35,054 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 402.1ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 06:29:35,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2021-06-05 06:29:35,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 841. [2021-06-05 06:29:35,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 3.3107142857142855) internal successors, (2781), 840 states have internal predecessors, (2781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:35,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2781 transitions. [2021-06-05 06:29:35,080 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2781 transitions. Word has length 24 [2021-06-05 06:29:35,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:29:35,080 INFO L482 AbstractCegarLoop]: Abstraction has 841 states and 2781 transitions. [2021-06-05 06:29:35,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:35,081 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2781 transitions. [2021-06-05 06:29:35,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:29:35,082 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:29:35,082 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:29:35,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:35,301 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:29:35,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:29:35,301 INFO L82 PathProgramCache]: Analyzing trace with hash 956356005, now seen corresponding path program 15 times [2021-06-05 06:29:35,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:29:35,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435681452] [2021-06-05 06:29:35,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:29:35,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:35,340 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:35,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:29:35,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435681452] [2021-06-05 06:29:35,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435681452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:35,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475270165] [2021-06-05 06:29:35,340 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:35,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:29:35,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:29:35,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:29:35,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:29:35,458 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:35,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475270165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:35,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:29:35,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 06:29:35,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121012435] [2021-06-05 06:29:35,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:29:35,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:29:35,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:29:35,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:29:35,460 INFO L87 Difference]: Start difference. First operand 841 states and 2781 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:36,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:29:36,137 INFO L93 Difference]: Finished difference Result 2693 states and 8043 transitions. [2021-06-05 06:29:36,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 06:29:36,137 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:29:36,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:29:36,143 INFO L225 Difference]: With dead ends: 2693 [2021-06-05 06:29:36,144 INFO L226 Difference]: Without dead ends: 2693 [2021-06-05 06:29:36,144 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 416.1ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 06:29:36,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-06-05 06:29:36,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 831. [2021-06-05 06:29:36,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 3.289156626506024) internal successors, (2730), 830 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:36,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2730 transitions. [2021-06-05 06:29:36,172 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2730 transitions. Word has length 24 [2021-06-05 06:29:36,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:29:36,172 INFO L482 AbstractCegarLoop]: Abstraction has 831 states and 2730 transitions. [2021-06-05 06:29:36,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:36,172 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2730 transitions. [2021-06-05 06:29:36,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:29:36,173 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:29:36,173 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:29:36,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-06-05 06:29:36,389 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:29:36,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:29:36,389 INFO L82 PathProgramCache]: Analyzing trace with hash -215989853, now seen corresponding path program 16 times [2021-06-05 06:29:36,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:29:36,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685767670] [2021-06-05 06:29:36,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:29:36,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:36,423 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:36,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:29:36,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685767670] [2021-06-05 06:29:36,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685767670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:36,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571286894] [2021-06-05 06:29:36,423 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:36,455 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:29:36,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:29:36,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:29:36,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:29:36,515 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:36,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571286894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:36,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:29:36,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 06:29:36,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76358257] [2021-06-05 06:29:36,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:29:36,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:29:36,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:29:36,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:29:36,516 INFO L87 Difference]: Start difference. First operand 831 states and 2730 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:37,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:29:37,091 INFO L93 Difference]: Finished difference Result 2677 states and 7780 transitions. [2021-06-05 06:29:37,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 06:29:37,091 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 24 [2021-06-05 06:29:37,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:29:37,096 INFO L225 Difference]: With dead ends: 2677 [2021-06-05 06:29:37,097 INFO L226 Difference]: Without dead ends: 2677 [2021-06-05 06:29:37,097 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 346.5ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 06:29:37,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-06-05 06:29:37,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 845. [2021-06-05 06:29:37,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2997630331753554) internal successors, (2785), 844 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:37,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2785 transitions. [2021-06-05 06:29:37,122 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2785 transitions. Word has length 24 [2021-06-05 06:29:37,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:29:37,122 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2785 transitions. [2021-06-05 06:29:37,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:37,122 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2785 transitions. [2021-06-05 06:29:37,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:29:37,124 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:29:37,124 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:29:37,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-06-05 06:29:37,340 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:29:37,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:29:37,340 INFO L82 PathProgramCache]: Analyzing trace with hash -134613765, now seen corresponding path program 17 times [2021-06-05 06:29:37,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:29:37,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476436676] [2021-06-05 06:29:37,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:29:37,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:37,372 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:37,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:29:37,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476436676] [2021-06-05 06:29:37,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476436676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:37,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344118162] [2021-06-05 06:29:37,372 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:37,396 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:29:37,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:29:37,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:29:37,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:29:37,466 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:37,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344118162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:37,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:29:37,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 06:29:37,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935255790] [2021-06-05 06:29:37,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:29:37,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:29:37,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:29:37,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:29:37,467 INFO L87 Difference]: Start difference. First operand 845 states and 2785 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:37,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:29:37,973 INFO L93 Difference]: Finished difference Result 2474 states and 7308 transitions. [2021-06-05 06:29:37,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 06:29:37,974 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 24 [2021-06-05 06:29:37,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:29:37,978 INFO L225 Difference]: With dead ends: 2474 [2021-06-05 06:29:37,978 INFO L226 Difference]: Without dead ends: 2470 [2021-06-05 06:29:37,979 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 301.2ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 06:29:37,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-06-05 06:29:37,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 845. [2021-06-05 06:29:38,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2973933649289098) internal successors, (2783), 844 states have internal predecessors, (2783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:38,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2783 transitions. [2021-06-05 06:29:38,002 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2783 transitions. Word has length 24 [2021-06-05 06:29:38,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:29:38,002 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2783 transitions. [2021-06-05 06:29:38,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:38,003 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2783 transitions. [2021-06-05 06:29:38,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:29:38,004 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:29:38,004 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:29:38,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:38,217 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:29:38,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:29:38,217 INFO L82 PathProgramCache]: Analyzing trace with hash 796043451, now seen corresponding path program 18 times [2021-06-05 06:29:38,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:29:38,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15441136] [2021-06-05 06:29:38,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:29:38,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:38,250 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:38,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:29:38,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15441136] [2021-06-05 06:29:38,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15441136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:38,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955147458] [2021-06-05 06:29:38,251 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:38,290 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:29:38,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:29:38,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:29:38,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:29:38,366 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:38,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955147458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:38,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:29:38,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 06:29:38,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681402091] [2021-06-05 06:29:38,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:29:38,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:29:38,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:29:38,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:29:38,367 INFO L87 Difference]: Start difference. First operand 845 states and 2783 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:38,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:29:38,943 INFO L93 Difference]: Finished difference Result 2514 states and 7408 transitions. [2021-06-05 06:29:38,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 06:29:38,943 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-06-05 06:29:38,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:29:38,948 INFO L225 Difference]: With dead ends: 2514 [2021-06-05 06:29:38,948 INFO L226 Difference]: Without dead ends: 2514 [2021-06-05 06:29:38,949 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 342.9ms TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 06:29:38,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-06-05 06:29:38,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 853. [2021-06-05 06:29:38,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.3039906103286385) internal successors, (2815), 852 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:38,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2815 transitions. [2021-06-05 06:29:38,973 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2815 transitions. Word has length 24 [2021-06-05 06:29:38,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:29:38,973 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2815 transitions. [2021-06-05 06:29:38,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:38,973 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2815 transitions. [2021-06-05 06:29:38,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:29:38,975 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:29:38,975 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:29:39,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-05 06:29:39,189 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:29:39,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:29:39,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1855884691, now seen corresponding path program 19 times [2021-06-05 06:29:39,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:29:39,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299032996] [2021-06-05 06:29:39,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:29:39,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:39,223 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:39,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:29:39,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299032996] [2021-06-05 06:29:39,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299032996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:39,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147164717] [2021-06-05 06:29:39,224 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:39,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:39,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:29:39,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:29:39,305 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:39,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147164717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:39,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:29:39,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 06:29:39,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946783284] [2021-06-05 06:29:39,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:29:39,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:29:39,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:29:39,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:29:39,307 INFO L87 Difference]: Start difference. First operand 853 states and 2815 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:39,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:29:39,837 INFO L93 Difference]: Finished difference Result 2332 states and 6984 transitions. [2021-06-05 06:29:39,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 06:29:39,837 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-06-05 06:29:39,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:29:39,841 INFO L225 Difference]: With dead ends: 2332 [2021-06-05 06:29:39,841 INFO L226 Difference]: Without dead ends: 2328 [2021-06-05 06:29:39,842 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 300.0ms TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 06:29:39,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-06-05 06:29:39,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 853. [2021-06-05 06:29:39,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.301643192488263) internal successors, (2813), 852 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:39,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2813 transitions. [2021-06-05 06:29:39,862 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2813 transitions. Word has length 24 [2021-06-05 06:29:39,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:29:39,863 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2813 transitions. [2021-06-05 06:29:39,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:39,863 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2813 transitions. [2021-06-05 06:29:39,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:29:39,864 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:29:39,864 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:29:40,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 06:29:40,080 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:29:40,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:29:40,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1526797053, now seen corresponding path program 3 times [2021-06-05 06:29:40,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:29:40,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655257352] [2021-06-05 06:29:40,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:29:40,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:40,104 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:29:40,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:29:40,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655257352] [2021-06-05 06:29:40,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655257352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:40,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974924608] [2021-06-05 06:29:40,105 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:40,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 06:29:40,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:29:40,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 06:29:40,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:29:40,190 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:29:40,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974924608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:40,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:29:40,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 06:29:40,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690626524] [2021-06-05 06:29:40,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 06:29:40,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:29:40,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 06:29:40,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 06:29:40,191 INFO L87 Difference]: Start difference. First operand 853 states and 2813 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:40,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:29:40,258 INFO L93 Difference]: Finished difference Result 929 states and 3034 transitions. [2021-06-05 06:29:40,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 06:29:40,258 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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 24 [2021-06-05 06:29:40,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:29:40,260 INFO L225 Difference]: With dead ends: 929 [2021-06-05 06:29:40,260 INFO L226 Difference]: Without dead ends: 929 [2021-06-05 06:29:40,260 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 57.0ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:29:40,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-06-05 06:29:40,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 780. [2021-06-05 06:29:40,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 3.3029525032092426) internal successors, (2573), 779 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:40,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2573 transitions. [2021-06-05 06:29:40,271 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2573 transitions. Word has length 24 [2021-06-05 06:29:40,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:29:40,271 INFO L482 AbstractCegarLoop]: Abstraction has 780 states and 2573 transitions. [2021-06-05 06:29:40,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:40,272 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2573 transitions. [2021-06-05 06:29:40,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:29:40,273 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:29:40,273 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:29:40,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:40,489 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:29:40,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:29:40,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1837970499, now seen corresponding path program 20 times [2021-06-05 06:29:40,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:29:40,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558126137] [2021-06-05 06:29:40,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:29:40,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:40,523 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:40,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:29:40,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558126137] [2021-06-05 06:29:40,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558126137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:40,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137954640] [2021-06-05 06:29:40,524 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:40,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:29:40,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:29:40,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:29:40,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:29:40,600 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:40,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137954640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:40,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:29:40,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 06:29:40,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017918369] [2021-06-05 06:29:40,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 06:29:40,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:29:40,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 06:29:40,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 06:29:40,601 INFO L87 Difference]: Start difference. First operand 780 states and 2573 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:40,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:29:40,867 INFO L93 Difference]: Finished difference Result 1555 states and 4761 transitions. [2021-06-05 06:29:40,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 06:29:40,867 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:29:40,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:29:40,870 INFO L225 Difference]: With dead ends: 1555 [2021-06-05 06:29:40,870 INFO L226 Difference]: Without dead ends: 1555 [2021-06-05 06:29:40,870 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 138.2ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:29:40,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2021-06-05 06:29:40,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 842. [2021-06-05 06:29:40,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 3.296076099881094) internal successors, (2772), 841 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:40,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2772 transitions. [2021-06-05 06:29:40,884 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2772 transitions. Word has length 24 [2021-06-05 06:29:40,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:29:40,885 INFO L482 AbstractCegarLoop]: Abstraction has 842 states and 2772 transitions. [2021-06-05 06:29:40,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:40,885 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2772 transitions. [2021-06-05 06:29:40,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:29:40,886 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:29:40,886 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:29:41,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-05 06:29:41,101 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:29:41,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:29:41,101 INFO L82 PathProgramCache]: Analyzing trace with hash 64708953, now seen corresponding path program 21 times [2021-06-05 06:29:41,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:29:41,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185696393] [2021-06-05 06:29:41,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:29:41,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:41,124 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:41,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:29:41,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185696393] [2021-06-05 06:29:41,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185696393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:41,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754050997] [2021-06-05 06:29:41,125 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) [2021-06-05 06:29:41,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:29:41,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:29:41,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:29:41,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:41,213 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:41,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754050997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:41,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:29:41,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 06:29:41,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188212537] [2021-06-05 06:29:41,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 06:29:41,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:29:41,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 06:29:41,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 06:29:41,216 INFO L87 Difference]: Start difference. First operand 842 states and 2772 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:41,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:29:41,455 INFO L93 Difference]: Finished difference Result 1605 states and 4891 transitions. [2021-06-05 06:29:41,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 06:29:41,456 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:29:41,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:29:41,465 INFO L225 Difference]: With dead ends: 1605 [2021-06-05 06:29:41,465 INFO L226 Difference]: Without dead ends: 1605 [2021-06-05 06:29:41,465 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 146.0ms TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:29:41,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-06-05 06:29:41,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 896. [2021-06-05 06:29:41,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.2905027932960893) internal successors, (2945), 895 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:41,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2945 transitions. [2021-06-05 06:29:41,482 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2945 transitions. Word has length 24 [2021-06-05 06:29:41,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:29:41,482 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2945 transitions. [2021-06-05 06:29:41,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:41,482 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2945 transitions. [2021-06-05 06:29:41,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:29:41,483 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:29:41,483 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:29:41,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:41,699 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:29:41,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:29:41,699 INFO L82 PathProgramCache]: Analyzing trace with hash 19887811, now seen corresponding path program 22 times [2021-06-05 06:29:41,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:29:41,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360375316] [2021-06-05 06:29:41,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:29:41,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:41,724 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:29:41,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:29:41,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360375316] [2021-06-05 06:29:41,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360375316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:41,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329988891] [2021-06-05 06:29:41,724 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:41,747 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:29:41,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:29:41,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:29:41,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:29:41,785 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:29:41,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329988891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:41,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:29:41,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 06:29:41,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37883561] [2021-06-05 06:29:41,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 06:29:41,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:29:41,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 06:29:41,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 06:29:41,786 INFO L87 Difference]: Start difference. First operand 896 states and 2945 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:41,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:29:41,949 INFO L93 Difference]: Finished difference Result 1524 states and 4690 transitions. [2021-06-05 06:29:41,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 06:29:41,950 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:29:41,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:29:41,952 INFO L225 Difference]: With dead ends: 1524 [2021-06-05 06:29:41,952 INFO L226 Difference]: Without dead ends: 1520 [2021-06-05 06:29:41,953 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 81.6ms TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:29:41,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-06-05 06:29:41,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 896. [2021-06-05 06:29:41,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.288268156424581) internal successors, (2943), 895 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:41,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2943 transitions. [2021-06-05 06:29:41,968 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2943 transitions. Word has length 24 [2021-06-05 06:29:41,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:29:41,968 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2943 transitions. [2021-06-05 06:29:41,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:41,968 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2943 transitions. [2021-06-05 06:29:41,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:29:41,969 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:29:41,969 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:29:42,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-06-05 06:29:42,182 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:29:42,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:29:42,182 INFO L82 PathProgramCache]: Analyzing trace with hash 617224469, now seen corresponding path program 23 times [2021-06-05 06:29:42,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:29:42,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165349847] [2021-06-05 06:29:42,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:29:42,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:42,209 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:42,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:29:42,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165349847] [2021-06-05 06:29:42,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165349847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:42,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261850088] [2021-06-05 06:29:42,209 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:42,231 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:29:42,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:29:42,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:29:42,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:29:42,282 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:42,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261850088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:42,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:29:42,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 06:29:42,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812219392] [2021-06-05 06:29:42,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 06:29:42,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:29:42,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 06:29:42,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 06:29:42,283 INFO L87 Difference]: Start difference. First operand 896 states and 2943 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:42,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:29:42,484 INFO L93 Difference]: Finished difference Result 1508 states and 4652 transitions. [2021-06-05 06:29:42,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 06:29:42,484 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:29:42,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:29:42,486 INFO L225 Difference]: With dead ends: 1508 [2021-06-05 06:29:42,486 INFO L226 Difference]: Without dead ends: 1496 [2021-06-05 06:29:42,486 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 116.0ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:29:42,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-06-05 06:29:42,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 904. [2021-06-05 06:29:42,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 3.276854928017719) internal successors, (2959), 903 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:42,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2959 transitions. [2021-06-05 06:29:42,500 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2959 transitions. Word has length 24 [2021-06-05 06:29:42,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:29:42,500 INFO L482 AbstractCegarLoop]: Abstraction has 904 states and 2959 transitions. [2021-06-05 06:29:42,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:42,500 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2959 transitions. [2021-06-05 06:29:42,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:29:42,502 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:29:42,502 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:29:42,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:42,710 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:29:42,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:29:42,711 INFO L82 PathProgramCache]: Analyzing trace with hash 90804185, now seen corresponding path program 24 times [2021-06-05 06:29:42,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:29:42,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510838517] [2021-06-05 06:29:42,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:29:42,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:42,759 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:42,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:29:42,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510838517] [2021-06-05 06:29:42,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510838517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:42,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980347766] [2021-06-05 06:29:42,760 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:42,782 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:29:42,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:29:42,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:29:42,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:29:42,857 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:42,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980347766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:42,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:29:42,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 06:29:42,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024431853] [2021-06-05 06:29:42,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:29:42,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:29:42,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:29:42,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:29:42,859 INFO L87 Difference]: Start difference. First operand 904 states and 2959 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:43,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:29:43,328 INFO L93 Difference]: Finished difference Result 2412 states and 7565 transitions. [2021-06-05 06:29:43,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 06:29:43,328 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:29:43,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:29:43,332 INFO L225 Difference]: With dead ends: 2412 [2021-06-05 06:29:43,332 INFO L226 Difference]: Without dead ends: 2412 [2021-06-05 06:29:43,332 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 283.3ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 06:29:43,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-06-05 06:29:43,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 960. [2021-06-05 06:29:43,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 3.367049009384776) internal successors, (3229), 959 states have internal predecessors, (3229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:43,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3229 transitions. [2021-06-05 06:29:43,353 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3229 transitions. Word has length 24 [2021-06-05 06:29:43,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:29:43,354 INFO L482 AbstractCegarLoop]: Abstraction has 960 states and 3229 transitions. [2021-06-05 06:29:43,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:43,354 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3229 transitions. [2021-06-05 06:29:43,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:29:43,355 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:29:43,355 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:29:43,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-06-05 06:29:43,569 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:29:43,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:29:43,569 INFO L82 PathProgramCache]: Analyzing trace with hash 657756265, now seen corresponding path program 25 times [2021-06-05 06:29:43,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:29:43,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319698602] [2021-06-05 06:29:43,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:29:43,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:43,597 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:43,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:29:43,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319698602] [2021-06-05 06:29:43,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319698602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:43,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307336734] [2021-06-05 06:29:43,597 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 06:29:43,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:43,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:29:43,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:43,714 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:43,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307336734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:43,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:29:43,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 06:29:43,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773498163] [2021-06-05 06:29:43,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:29:43,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:29:43,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:29:43,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:29:43,715 INFO L87 Difference]: Start difference. First operand 960 states and 3229 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:44,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:29:44,113 INFO L93 Difference]: Finished difference Result 2335 states and 7372 transitions. [2021-06-05 06:29:44,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 06:29:44,113 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:29:44,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:29:44,116 INFO L225 Difference]: With dead ends: 2335 [2021-06-05 06:29:44,116 INFO L226 Difference]: Without dead ends: 2335 [2021-06-05 06:29:44,117 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 274.5ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 06:29:44,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-06-05 06:29:44,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 957. [2021-06-05 06:29:44,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:44,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-05 06:29:44,135 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-05 06:29:44,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:29:44,135 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-05 06:29:44,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:44,135 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-05 06:29:44,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:29:44,137 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:29:44,137 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:29:44,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:44,345 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:29:44,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:29:44,345 INFO L82 PathProgramCache]: Analyzing trace with hash -514589593, now seen corresponding path program 26 times [2021-06-05 06:29:44,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:29:44,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805438985] [2021-06-05 06:29:44,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:29:44,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:44,378 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:44,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:29:44,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805438985] [2021-06-05 06:29:44,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805438985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:44,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251116395] [2021-06-05 06:29:44,379 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) [2021-06-05 06:29:44,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:29:44,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:29:44,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:29:44,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:44,466 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:44,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251116395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:44,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:29:44,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 06:29:44,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353658395] [2021-06-05 06:29:44,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:29:44,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:29:44,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:29:44,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:29:44,468 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:44,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:29:44,818 INFO L93 Difference]: Finished difference Result 2285 states and 7121 transitions. [2021-06-05 06:29:44,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 06:29:44,820 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 24 [2021-06-05 06:29:44,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:29:44,823 INFO L225 Difference]: With dead ends: 2285 [2021-06-05 06:29:44,823 INFO L226 Difference]: Without dead ends: 2285 [2021-06-05 06:29:44,824 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 217.3ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:29:44,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-06-05 06:29:44,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 963. [2021-06-05 06:29:44,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:44,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-06-05 06:29:44,844 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-06-05 06:29:44,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:29:44,844 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-06-05 06:29:44,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:44,844 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-06-05 06:29:44,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:29:44,846 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:29:44,846 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:29:45,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-06-05 06:29:45,061 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:29:45,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:29:45,061 INFO L82 PathProgramCache]: Analyzing trace with hash -433213505, now seen corresponding path program 27 times [2021-06-05 06:29:45,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:29:45,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139775326] [2021-06-05 06:29:45,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:29:45,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:45,088 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:45,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:29:45,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139775326] [2021-06-05 06:29:45,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139775326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:45,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74960351] [2021-06-05 06:29:45,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:45,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:29:45,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:29:45,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:29:45,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:29:45,177 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:45,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74960351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:45,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:29:45,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 06:29:45,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005285599] [2021-06-05 06:29:45,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:29:45,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:29:45,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:29:45,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:29:45,178 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:45,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:29:45,492 INFO L93 Difference]: Finished difference Result 2176 states and 6849 transitions. [2021-06-05 06:29:45,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 06:29:45,493 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 24 [2021-06-05 06:29:45,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:29:45,495 INFO L225 Difference]: With dead ends: 2176 [2021-06-05 06:29:45,496 INFO L226 Difference]: Without dead ends: 2172 [2021-06-05 06:29:45,496 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 189.8ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:29:45,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-06-05 06:29:45,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 957. [2021-06-05 06:29:45,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:45,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-05 06:29:45,513 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-05 06:29:45,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:29:45,513 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-05 06:29:45,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:45,514 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-05 06:29:45,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:29:45,515 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:29:45,515 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:29:45,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:45,729 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:29:45,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:29:45,729 INFO L82 PathProgramCache]: Analyzing trace with hash 497443711, now seen corresponding path program 28 times [2021-06-05 06:29:45,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:29:45,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278732254] [2021-06-05 06:29:45,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:29:45,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:45,756 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:45,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:29:45,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278732254] [2021-06-05 06:29:45,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278732254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:45,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662704200] [2021-06-05 06:29:45,757 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:45,778 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:29:45,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:29:45,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:29:45,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:29:45,848 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:45,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662704200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:45,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:29:45,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 06:29:45,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693132879] [2021-06-05 06:29:45,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:29:45,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:29:45,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:29:45,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:29:45,849 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:46,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:29:46,183 INFO L93 Difference]: Finished difference Result 2199 states and 6893 transitions. [2021-06-05 06:29:46,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 06:29:46,184 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-06-05 06:29:46,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:29:46,187 INFO L225 Difference]: With dead ends: 2199 [2021-06-05 06:29:46,187 INFO L226 Difference]: Without dead ends: 2199 [2021-06-05 06:29:46,188 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 216.6ms TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:29:46,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-06-05 06:29:46,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 963. [2021-06-05 06:29:46,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:46,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-06-05 06:29:46,205 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-06-05 06:29:46,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:29:46,206 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-06-05 06:29:46,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:46,206 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-06-05 06:29:46,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:29:46,207 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:29:46,207 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:29:46,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-05 06:29:46,408 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:29:46,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:29:46,408 INFO L82 PathProgramCache]: Analyzing trace with hash 2140482865, now seen corresponding path program 29 times [2021-06-05 06:29:46,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:29:46,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109797313] [2021-06-05 06:29:46,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:29:46,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:46,439 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:46,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:29:46,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109797313] [2021-06-05 06:29:46,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109797313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:46,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188639374] [2021-06-05 06:29:46,439 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:46,462 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:29:46,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:29:46,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:29:46,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:29:46,559 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:46,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188639374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:46,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:29:46,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 06:29:46,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002096073] [2021-06-05 06:29:46,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:29:46,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:29:46,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:29:46,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:29:46,561 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:46,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:29:46,882 INFO L93 Difference]: Finished difference Result 2156 states and 6791 transitions. [2021-06-05 06:29:46,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 06:29:46,883 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-06-05 06:29:46,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:29:46,889 INFO L225 Difference]: With dead ends: 2156 [2021-06-05 06:29:46,889 INFO L226 Difference]: Without dead ends: 2152 [2021-06-05 06:29:46,889 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 205.0ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-06-05 06:29:46,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2021-06-05 06:29:46,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 957. [2021-06-05 06:29:46,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:46,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-05 06:29:46,907 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-05 06:29:46,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:29:46,907 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-05 06:29:46,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:46,907 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-05 06:29:46,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:29:46,909 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:29:46,909 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:29:47,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-05 06:29:47,125 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:29:47,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:29:47,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1151056447, now seen corresponding path program 30 times [2021-06-05 06:29:47,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:29:47,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326715557] [2021-06-05 06:29:47,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:29:47,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:47,153 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:47,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:29:47,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326715557] [2021-06-05 06:29:47,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326715557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:47,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273063683] [2021-06-05 06:29:47,154 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:47,177 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:29:47,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:29:47,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:29:47,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:29:47,235 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:47,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273063683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:47,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:29:47,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 06:29:47,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431624281] [2021-06-05 06:29:47,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:29:47,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:29:47,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:29:47,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:29:47,236 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:47,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:29:47,589 INFO L93 Difference]: Finished difference Result 2097 states and 6377 transitions. [2021-06-05 06:29:47,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 06:29:47,589 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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 24 [2021-06-05 06:29:47,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:29:47,592 INFO L225 Difference]: With dead ends: 2097 [2021-06-05 06:29:47,592 INFO L226 Difference]: Without dead ends: 2097 [2021-06-05 06:29:47,592 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 183.1ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:29:47,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-06-05 06:29:47,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1047. [2021-06-05 06:29:47,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.378585086042065) internal successors, (3534), 1046 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:47,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3534 transitions. [2021-06-05 06:29:47,611 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3534 transitions. Word has length 24 [2021-06-05 06:29:47,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:29:47,611 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3534 transitions. [2021-06-05 06:29:47,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:47,611 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3534 transitions. [2021-06-05 06:29:47,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:29:47,613 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:29:47,613 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:29:47,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-05 06:29:47,814 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:29:47,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:29:47,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1069680359, now seen corresponding path program 31 times [2021-06-05 06:29:47,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:29:47,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336255513] [2021-06-05 06:29:47,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:29:47,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:47,839 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:47,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:29:47,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336255513] [2021-06-05 06:29:47,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336255513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:47,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323016760] [2021-06-05 06:29:47,840 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:47,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:47,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:29:47,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:29:47,906 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:47,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323016760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:47,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:29:47,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 06:29:47,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061453637] [2021-06-05 06:29:47,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:29:47,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:29:47,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:29:47,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:29:47,907 INFO L87 Difference]: Start difference. First operand 1047 states and 3534 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:48,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:29:48,144 INFO L93 Difference]: Finished difference Result 1963 states and 6051 transitions. [2021-06-05 06:29:48,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 06:29:48,145 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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 24 [2021-06-05 06:29:48,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:29:48,147 INFO L225 Difference]: With dead ends: 1963 [2021-06-05 06:29:48,147 INFO L226 Difference]: Without dead ends: 1959 [2021-06-05 06:29:48,148 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 138.9ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:29:48,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-06-05 06:29:48,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1047. [2021-06-05 06:29:48,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.376673040152964) internal successors, (3532), 1046 states have internal predecessors, (3532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:48,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3532 transitions. [2021-06-05 06:29:48,165 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3532 transitions. Word has length 24 [2021-06-05 06:29:48,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:29:48,165 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3532 transitions. [2021-06-05 06:29:48,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:48,165 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3532 transitions. [2021-06-05 06:29:48,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:29:48,167 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:29:48,167 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:29:48,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 06:29:48,382 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:29:48,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:29:48,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1710194965, now seen corresponding path program 32 times [2021-06-05 06:29:48,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:29:48,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057541599] [2021-06-05 06:29:48,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:29:48,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:48,420 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:48,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:29:48,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057541599] [2021-06-05 06:29:48,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057541599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:48,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094407008] [2021-06-05 06:29:48,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:48,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:29:48,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:29:48,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:29:48,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:29:48,497 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:48,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094407008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:48,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:29:48,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 06:29:48,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139302391] [2021-06-05 06:29:48,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:29:48,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:29:48,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:29:48,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:29:48,498 INFO L87 Difference]: Start difference. First operand 1047 states and 3532 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:48,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:29:48,690 INFO L93 Difference]: Finished difference Result 1728 states and 5494 transitions. [2021-06-05 06:29:48,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 06:29:48,690 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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 24 [2021-06-05 06:29:48,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:29:48,693 INFO L225 Difference]: With dead ends: 1728 [2021-06-05 06:29:48,693 INFO L226 Difference]: Without dead ends: 1716 [2021-06-05 06:29:48,693 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 116.0ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:29:48,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2021-06-05 06:29:48,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1047. [2021-06-05 06:29:48,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.372848948374761) internal successors, (3528), 1046 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:48,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3528 transitions. [2021-06-05 06:29:48,709 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3528 transitions. Word has length 24 [2021-06-05 06:29:48,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:29:48,709 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3528 transitions. [2021-06-05 06:29:48,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:48,709 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3528 transitions. [2021-06-05 06:29:48,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:29:48,710 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:29:48,710 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:29:48,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:48,911 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:29:48,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:29:48,911 INFO L82 PathProgramCache]: Analyzing trace with hash -987645615, now seen corresponding path program 33 times [2021-06-05 06:29:48,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:29:48,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583143971] [2021-06-05 06:29:48,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:29:48,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:48,944 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:48,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:29:48,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583143971] [2021-06-05 06:29:48,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583143971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:48,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052412418] [2021-06-05 06:29:48,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:48,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:29:48,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:29:48,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:29:48,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:29:49,034 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:49,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052412418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:49,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:29:49,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 06:29:49,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277337009] [2021-06-05 06:29:49,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:29:49,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:29:49,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:29:49,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:29:49,035 INFO L87 Difference]: Start difference. First operand 1047 states and 3528 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:49,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:29:49,347 INFO L93 Difference]: Finished difference Result 1821 states and 5719 transitions. [2021-06-05 06:29:49,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 06:29:49,348 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-06-05 06:29:49,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:29:49,350 INFO L225 Difference]: With dead ends: 1821 [2021-06-05 06:29:49,350 INFO L226 Difference]: Without dead ends: 1821 [2021-06-05 06:29:49,350 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 207.8ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-06-05 06:29:49,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-06-05 06:29:49,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1119. [2021-06-05 06:29:49,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.370304114490161) internal successors, (3768), 1118 states have internal predecessors, (3768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:49,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3768 transitions. [2021-06-05 06:29:49,367 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3768 transitions. Word has length 24 [2021-06-05 06:29:49,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:29:49,367 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3768 transitions. [2021-06-05 06:29:49,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:49,368 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3768 transitions. [2021-06-05 06:29:49,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:29:49,369 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:29:49,369 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:29:49,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:49,585 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:29:49,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:29:49,585 INFO L82 PathProgramCache]: Analyzing trace with hash 655393539, now seen corresponding path program 34 times [2021-06-05 06:29:49,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:29:49,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257161757] [2021-06-05 06:29:49,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:29:49,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:49,614 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:49,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:29:49,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257161757] [2021-06-05 06:29:49,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257161757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:49,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263047194] [2021-06-05 06:29:49,614 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:49,637 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:29:49,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:29:49,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:29:49,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:29:49,705 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:49,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263047194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:49,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:29:49,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 06:29:49,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066691348] [2021-06-05 06:29:49,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:29:49,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:29:49,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:29:49,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:29:49,706 INFO L87 Difference]: Start difference. First operand 1119 states and 3768 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:49,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:29:49,951 INFO L93 Difference]: Finished difference Result 1790 states and 5648 transitions. [2021-06-05 06:29:49,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 06:29:49,952 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-06-05 06:29:49,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:29:49,954 INFO L225 Difference]: With dead ends: 1790 [2021-06-05 06:29:49,954 INFO L226 Difference]: Without dead ends: 1786 [2021-06-05 06:29:49,954 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 158.7ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:29:49,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-06-05 06:29:49,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1119. [2021-06-05 06:29:49,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.368515205724508) internal successors, (3766), 1118 states have internal predecessors, (3766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:49,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3766 transitions. [2021-06-05 06:29:49,969 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3766 transitions. Word has length 24 [2021-06-05 06:29:49,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:29:49,969 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3766 transitions. [2021-06-05 06:29:49,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:49,969 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3766 transitions. [2021-06-05 06:29:49,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:29:49,971 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:29:49,971 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:29:50,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-06-05 06:29:50,182 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:29:50,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:29:50,182 INFO L82 PathProgramCache]: Analyzing trace with hash -612063639, now seen corresponding path program 35 times [2021-06-05 06:29:50,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:29:50,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696899378] [2021-06-05 06:29:50,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:29:50,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:50,219 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:50,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:29:50,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696899378] [2021-06-05 06:29:50,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696899378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:50,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013038950] [2021-06-05 06:29:50,219 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:50,254 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:29:50,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:29:50,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:29:50,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:29:50,302 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:50,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013038950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:50,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:29:50,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 06:29:50,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492485054] [2021-06-05 06:29:50,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:29:50,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:29:50,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:29:50,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:29:50,303 INFO L87 Difference]: Start difference. First operand 1119 states and 3766 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:50,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:29:50,438 INFO L93 Difference]: Finished difference Result 1649 states and 5332 transitions. [2021-06-05 06:29:50,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:29:50,438 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 24 [2021-06-05 06:29:50,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:29:50,441 INFO L225 Difference]: With dead ends: 1649 [2021-06-05 06:29:50,441 INFO L226 Difference]: Without dead ends: 1637 [2021-06-05 06:29:50,441 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 82.9ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:29:50,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2021-06-05 06:29:50,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1119. [2021-06-05 06:29:50,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.3649373881932023) internal successors, (3762), 1118 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:50,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3762 transitions. [2021-06-05 06:29:50,456 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3762 transitions. Word has length 24 [2021-06-05 06:29:50,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:29:50,456 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3762 transitions. [2021-06-05 06:29:50,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:50,456 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3762 transitions. [2021-06-05 06:29:50,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:29:50,457 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:29:50,457 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:29:50,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:50,673 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:29:50,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:29:50,674 INFO L82 PathProgramCache]: Analyzing trace with hash 2003913975, now seen corresponding path program 4 times [2021-06-05 06:29:50,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:29:50,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089268588] [2021-06-05 06:29:50,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:29:50,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:50,865 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:50,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:29:50,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089268588] [2021-06-05 06:29:50,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089268588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:50,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209112416] [2021-06-05 06:29:50,865 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:50,887 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:29:50,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:29:50,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:29:50,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:29:51,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:29:51,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:29:51,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-06-05 06:29:51,036 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:29:51,042 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:51,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:29:51,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:29:51,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:29:51,047 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:29:51,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:51,058 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:51,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-05 06:29:51,061 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:29:51,068 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:51,071 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:29:51,071 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-05 06:29:51,086 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:51,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209112416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:51,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:29:51,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 06:29:51,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587555321] [2021-06-05 06:29:51,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:29:51,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:29:51,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:29:51,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:29:51,087 INFO L87 Difference]: Start difference. First operand 1119 states and 3762 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:51,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:29:51,577 INFO L93 Difference]: Finished difference Result 1517 states and 4955 transitions. [2021-06-05 06:29:51,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:29:51,577 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:29:51,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:29:51,579 INFO L225 Difference]: With dead ends: 1517 [2021-06-05 06:29:51,579 INFO L226 Difference]: Without dead ends: 1502 [2021-06-05 06:29:51,579 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 475.2ms TimeCoverageRelationStatistics Valid=139, Invalid=511, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:29:51,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2021-06-05 06:29:51,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1141. [2021-06-05 06:29:51,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 1140 states have (on average 3.362280701754386) internal successors, (3833), 1140 states have internal predecessors, (3833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:51,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3833 transitions. [2021-06-05 06:29:51,593 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3833 transitions. Word has length 26 [2021-06-05 06:29:51,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:29:51,594 INFO L482 AbstractCegarLoop]: Abstraction has 1141 states and 3833 transitions. [2021-06-05 06:29:51,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:51,594 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3833 transitions. [2021-06-05 06:29:51,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:29:51,595 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:29:51,595 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:29:51,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:51,796 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:29:51,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:29:51,796 INFO L82 PathProgramCache]: Analyzing trace with hash -24484041, now seen corresponding path program 5 times [2021-06-05 06:29:51,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:29:51,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149672201] [2021-06-05 06:29:51,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:29:51,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:51,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:51,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:29:51,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149672201] [2021-06-05 06:29:51,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149672201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:51,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360189929] [2021-06-05 06:29:51,986 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:52,008 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:29:52,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:29:52,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:29:52,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:29:52,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:29:52,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:29:52,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-06-05 06:29:52,173 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:29:52,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:52,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:29:52,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:29:52,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:29:52,188 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:29:52,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:52,201 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:52,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-05 06:29:52,203 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:29:52,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:52,213 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:29:52,213 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-05 06:29:52,230 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:52,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360189929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:52,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:29:52,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 06:29:52,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916176365] [2021-06-05 06:29:52,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:29:52,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:29:52,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:29:52,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:29:52,231 INFO L87 Difference]: Start difference. First operand 1141 states and 3833 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:52,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:29:52,733 INFO L93 Difference]: Finished difference Result 1495 states and 4899 transitions. [2021-06-05 06:29:52,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:29:52,733 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:29:52,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:29:52,736 INFO L225 Difference]: With dead ends: 1495 [2021-06-05 06:29:52,736 INFO L226 Difference]: Without dead ends: 1480 [2021-06-05 06:29:52,736 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 480.4ms TimeCoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:29:52,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2021-06-05 06:29:52,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 1150. [2021-06-05 06:29:52,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1149 states have (on average 3.3568320278503045) internal successors, (3857), 1149 states have internal predecessors, (3857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:52,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 3857 transitions. [2021-06-05 06:29:52,753 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 3857 transitions. Word has length 26 [2021-06-05 06:29:52,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:29:52,754 INFO L482 AbstractCegarLoop]: Abstraction has 1150 states and 3857 transitions. [2021-06-05 06:29:52,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:52,754 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 3857 transitions. [2021-06-05 06:29:52,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:29:52,755 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:29:52,756 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:29:52,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:52,969 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:29:52,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:29:52,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1566945267, now seen corresponding path program 36 times [2021-06-05 06:29:52,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:29:52,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98867634] [2021-06-05 06:29:52,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:29:52,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:53,255 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:53,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:29:53,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98867634] [2021-06-05 06:29:53,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98867634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:53,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462091304] [2021-06-05 06:29:53,256 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:53,291 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:29:53,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:29:53,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:29:53,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:29:53,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:29:53,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:29:53,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:29:53,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:29:53,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-06-05 06:29:53,429 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:29:53,434 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:53,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:29:53,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:29:53,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:29:53,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:29:53,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 06:29:53,441 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:29:53,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:53,451 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:53,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-05 06:29:53,453 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:29:53,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:53,461 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:29:53,461 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-05 06:29:53,476 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:53,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462091304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:53,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:29:53,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-05 06:29:53,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339943877] [2021-06-05 06:29:53,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:29:53,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:29:53,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:29:53,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:29:53,478 INFO L87 Difference]: Start difference. First operand 1150 states and 3857 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:55,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:29:55,206 INFO L93 Difference]: Finished difference Result 1650 states and 5321 transitions. [2021-06-05 06:29:55,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 06:29:55,206 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:29:55,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:29:55,208 INFO L225 Difference]: With dead ends: 1650 [2021-06-05 06:29:55,208 INFO L226 Difference]: Without dead ends: 1635 [2021-06-05 06:29:55,208 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 1488.2ms TimeCoverageRelationStatistics Valid=311, Invalid=1495, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 06:29:55,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2021-06-05 06:29:55,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1180. [2021-06-05 06:29:55,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 3.340966921119593) internal successors, (3939), 1179 states have internal predecessors, (3939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:55,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3939 transitions. [2021-06-05 06:29:55,223 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3939 transitions. Word has length 26 [2021-06-05 06:29:55,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:29:55,223 INFO L482 AbstractCegarLoop]: Abstraction has 1180 states and 3939 transitions. [2021-06-05 06:29:55,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:55,223 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3939 transitions. [2021-06-05 06:29:55,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:29:55,224 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:29:55,224 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:29:55,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-06-05 06:29:55,425 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:29:55,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:29:55,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1922974853, now seen corresponding path program 6 times [2021-06-05 06:29:55,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:29:55,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030516384] [2021-06-05 06:29:55,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:29:55,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:55,602 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:55,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:29:55,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030516384] [2021-06-05 06:29:55,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030516384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:55,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573509851] [2021-06-05 06:29:55,602 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:55,626 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:29:55,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:29:55,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:29:55,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:29:55,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:29:55,751 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:55,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-06-05 06:29:55,779 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:29:55,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:55,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:29:55,794 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:55,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-05 06:29:55,814 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:29:55,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:55,842 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:55,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 06:29:55,867 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 06:29:55,913 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:55,929 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:29:55,930 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:49, output treesize:15 [2021-06-05 06:29:55,964 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:55,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573509851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:55,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:29:55,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 06:29:55,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352066278] [2021-06-05 06:29:55,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:29:55,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:29:55,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:29:55,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:29:55,965 INFO L87 Difference]: Start difference. First operand 1180 states and 3939 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:57,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:29:57,450 INFO L93 Difference]: Finished difference Result 1879 states and 5975 transitions. [2021-06-05 06:29:57,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 06:29:57,451 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:29:57,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:29:57,454 INFO L225 Difference]: With dead ends: 1879 [2021-06-05 06:29:57,454 INFO L226 Difference]: Without dead ends: 1864 [2021-06-05 06:29:57,454 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 1130.7ms TimeCoverageRelationStatistics Valid=290, Invalid=1602, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 06:29:57,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1864 states. [2021-06-05 06:29:57,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1864 to 1198. [2021-06-05 06:29:57,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 3.346700083542189) internal successors, (4006), 1197 states have internal predecessors, (4006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:57,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 4006 transitions. [2021-06-05 06:29:57,472 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 4006 transitions. Word has length 26 [2021-06-05 06:29:57,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:29:57,472 INFO L482 AbstractCegarLoop]: Abstraction has 1198 states and 4006 transitions. [2021-06-05 06:29:57,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:57,472 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 4006 transitions. [2021-06-05 06:29:57,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:29:57,473 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:29:57,474 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:29:57,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:57,689 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:29:57,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:29:57,689 INFO L82 PathProgramCache]: Analyzing trace with hash -372593289, now seen corresponding path program 37 times [2021-06-05 06:29:57,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:29:57,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239200245] [2021-06-05 06:29:57,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:29:57,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:57,946 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:57,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:29:57,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239200245] [2021-06-05 06:29:57,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239200245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:57,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877738368] [2021-06-05 06:29:57,946 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:57,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:57,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:29:57,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:29:58,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:29:58,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:29:58,164 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:58,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 63 [2021-06-05 06:29:58,272 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 06:29:58,289 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:58,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:29:58,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:29:58,306 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:58,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 53 [2021-06-05 06:29:58,409 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 06:29:58,435 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:58,469 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:58,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 83 [2021-06-05 06:29:58,679 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 06:29:59,179 WARN L205 SmtUtils]: Spent 499.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 131 [2021-06-05 06:29:59,180 INFO L628 ElimStorePlain]: treesize reduction 164, result has 91.1 percent of original size [2021-06-05 06:29:59,557 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:29:59,557 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:58, output treesize:102 [2021-06-05 06:29:59,606 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:59,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877738368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:59,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:29:59,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 06:29:59,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130157737] [2021-06-05 06:29:59,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:29:59,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:29:59,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:29:59,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:29:59,607 INFO L87 Difference]: Start difference. First operand 1198 states and 4006 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:30:00,111 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2021-06-05 06:30:00,843 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2021-06-05 06:30:01,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:30:01,491 INFO L93 Difference]: Finished difference Result 1814 states and 5791 transitions. [2021-06-05 06:30:01,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 06:30:01,491 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:30:01,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:30:01,494 INFO L225 Difference]: With dead ends: 1814 [2021-06-05 06:30:01,494 INFO L226 Difference]: Without dead ends: 1799 [2021-06-05 06:30:01,494 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 1759.1ms TimeCoverageRelationStatistics Valid=360, Invalid=1710, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 06:30:01,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1799 states. [2021-06-05 06:30:01,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1799 to 1206. [2021-06-05 06:30:01,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1206 states, 1205 states have (on average 3.349377593360996) internal successors, (4036), 1205 states have internal predecessors, (4036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:30:01,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1206 states to 1206 states and 4036 transitions. [2021-06-05 06:30:01,510 INFO L78 Accepts]: Start accepts. Automaton has 1206 states and 4036 transitions. Word has length 26 [2021-06-05 06:30:01,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:30:01,510 INFO L482 AbstractCegarLoop]: Abstraction has 1206 states and 4036 transitions. [2021-06-05 06:30:01,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:30:01,510 INFO L276 IsEmpty]: Start isEmpty. Operand 1206 states and 4036 transitions. [2021-06-05 06:30:01,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:30:01,512 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:30:01,512 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:30:01,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:30:01,712 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:30:01,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:30:01,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1348912133, now seen corresponding path program 38 times [2021-06-05 06:30:01,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:30:01,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616907303] [2021-06-05 06:30:01,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:30:01,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:30:01,902 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:30:01,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:30:01,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616907303] [2021-06-05 06:30:01,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616907303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:30:01,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277496191] [2021-06-05 06:30:01,902 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 06:30:01,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:30:01,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:30:01,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:30:01,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:30:04,273 WARN L205 SmtUtils]: Spent 633.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-06-05 06:30:05,096 WARN L205 SmtUtils]: Spent 794.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-06-05 06:30:05,130 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:05,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 83 [2021-06-05 06:30:05,829 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 06:30:05,869 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:05,901 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:05,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 75 [2021-06-05 06:30:06,561 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 06:30:06,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:06,676 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:06,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 83 [2021-06-05 06:30:06,922 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 06:30:07,872 WARN L205 SmtUtils]: Spent 949.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 145 [2021-06-05 06:30:07,873 INFO L628 ElimStorePlain]: treesize reduction 536, result has 75.4 percent of original size [2021-06-05 06:30:08,715 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 247 DAG size of output: 227 [2021-06-05 06:30:10,110 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 205 [2021-06-05 06:30:10,263 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 205 [2021-06-05 06:30:10,442 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 213 [2021-06-05 06:30:11,390 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 241 DAG size of output: 211 [2021-06-05 06:30:11,536 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 241 DAG size of output: 211 [2021-06-05 06:30:11,688 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 221 [2021-06-05 06:30:11,998 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 296 [2021-06-05 06:30:13,079 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 307 DAG size of output: 263 [2021-06-05 06:30:13,191 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 307 DAG size of output: 263 [2021-06-05 06:30:15,119 WARN L205 SmtUtils]: Spent 600.00 ms on a formula simplification. DAG size of input: 525 DAG size of output: 469 [2021-06-05 06:30:15,584 WARN L205 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 525 DAG size of output: 469 [2021-06-05 06:30:16,189 WARN L205 SmtUtils]: Spent 599.00 ms on a formula simplification. DAG size of input: 558 DAG size of output: 502 [2021-06-05 06:30:16,408 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 318 [2021-06-05 06:30:16,874 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 196 [2021-06-05 06:30:17,332 WARN L205 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 295 [2021-06-05 06:30:18,118 WARN L205 SmtUtils]: Spent 644.00 ms on a formula simplification. DAG size of input: 506 DAG size of output: 447 [2021-06-05 06:30:18,733 WARN L205 SmtUtils]: Spent 611.00 ms on a formula simplification. DAG size of input: 506 DAG size of output: 447 [2021-06-05 06:30:20,184 WARN L205 SmtUtils]: Spent 1.44 s on a formula simplification. DAG size of input: 511 DAG size of output: 493 [2021-06-05 06:30:20,719 WARN L205 SmtUtils]: Spent 504.00 ms on a formula simplification. DAG size of input: 425 DAG size of output: 399 [2021-06-05 06:30:21,369 WARN L205 SmtUtils]: Spent 648.00 ms on a formula simplification. DAG size of input: 429 DAG size of output: 365 [2021-06-05 06:30:21,375 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:30:21,375 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:65, output treesize:14812 [2021-06-05 06:30:22,022 WARN L205 SmtUtils]: Spent 646.00 ms on a formula simplification. DAG size of input: 429 DAG size of output: 365 [2021-06-05 06:30:22,357 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 365 DAG size of output: 365 [2021-06-05 06:30:22,682 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 365 DAG size of output: 365 [2021-06-05 06:30:23,008 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 365 DAG size of output: 365 [2021-06-05 06:30:24,160 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 359 DAG size of output: 57 [2021-06-05 06:30:24,295 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:30:24,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277496191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:30:24,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:30:24,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 06:30:24,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204866320] [2021-06-05 06:30:24,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:30:24,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:30:24,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:30:24,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=431, Unknown=1, NotChecked=0, Total=506 [2021-06-05 06:30:24,296 INFO L87 Difference]: Start difference. First operand 1206 states and 4036 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:30:41,197 WARN L205 SmtUtils]: Spent 3.03 s on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2021-06-05 06:31:11,278 WARN L205 SmtUtils]: Spent 3.11 s on a formula simplification. DAG size of input: 109 DAG size of output: 59 [2021-06-05 06:31:13,477 WARN L205 SmtUtils]: Spent 2.16 s on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2021-06-05 06:31:20,465 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 59 [2021-06-05 06:31:22,969 WARN L205 SmtUtils]: Spent 1.10 s on a formula simplification that was a NOOP. DAG size: 48 [2021-06-05 06:31:25,080 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification that was a NOOP. DAG size: 48 [2021-06-05 06:31:25,350 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-06-05 06:31:26,564 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2021-06-05 06:31:26,710 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 44 [2021-06-05 06:31:26,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:31:26,789 INFO L93 Difference]: Finished difference Result 2289 states and 7148 transitions. [2021-06-05 06:31:26,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 06:31:26,790 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:31:26,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:31:26,793 INFO L225 Difference]: With dead ends: 2289 [2021-06-05 06:31:26,793 INFO L226 Difference]: Without dead ends: 2259 [2021-06-05 06:31:26,794 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 26601.8ms TimeCoverageRelationStatistics Valid=438, Invalid=2632, Unknown=10, NotChecked=0, Total=3080 [2021-06-05 06:31:26,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2259 states. [2021-06-05 06:31:26,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2259 to 1219. [2021-06-05 06:31:26,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1219 states, 1218 states have (on average 3.3505747126436782) internal successors, (4081), 1218 states have internal predecessors, (4081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:26,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1219 states to 1219 states and 4081 transitions. [2021-06-05 06:31:26,812 INFO L78 Accepts]: Start accepts. Automaton has 1219 states and 4081 transitions. Word has length 26 [2021-06-05 06:31:26,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:31:26,812 INFO L482 AbstractCegarLoop]: Abstraction has 1219 states and 4081 transitions. [2021-06-05 06:31:26,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:26,812 INFO L276 IsEmpty]: Start isEmpty. Operand 1219 states and 4081 transitions. [2021-06-05 06:31:26,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:31:26,814 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:31:26,814 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:31:27,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable248 [2021-06-05 06:31:27,015 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:31:27,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:31:27,015 INFO L82 PathProgramCache]: Analyzing trace with hash 860987935, now seen corresponding path program 7 times [2021-06-05 06:31:27,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:31:27,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463957198] [2021-06-05 06:31:27,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:31:27,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:31:27,178 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:31:27,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:31:27,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463957198] [2021-06-05 06:31:27,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463957198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:31:27,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789025962] [2021-06-05 06:31:27,178 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:31:27,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:31:27,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:31:27,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:31:27,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:31:27,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:31:27,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-06-05 06:31:27,362 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:31:27,368 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:27,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:31:27,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:31:27,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:31:27,373 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:31:27,378 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:27,384 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:27,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-05 06:31:27,385 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:31:27,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:27,394 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:31:27,394 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-05 06:31:27,406 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:31:27,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789025962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:31:27,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:31:27,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 06:31:27,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517202774] [2021-06-05 06:31:27,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:31:27,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:31:27,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:31:27,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:31:27,407 INFO L87 Difference]: Start difference. First operand 1219 states and 4081 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:27,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:31:27,946 INFO L93 Difference]: Finished difference Result 1622 states and 5290 transitions. [2021-06-05 06:31:27,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 06:31:27,946 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:31:27,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:31:27,949 INFO L225 Difference]: With dead ends: 1622 [2021-06-05 06:31:27,949 INFO L226 Difference]: Without dead ends: 1607 [2021-06-05 06:31:27,949 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 536.5ms TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:31:27,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1607 states. [2021-06-05 06:31:27,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1607 to 1230. [2021-06-05 06:31:27,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1230 states, 1229 states have (on average 3.3474369406021154) internal successors, (4114), 1229 states have internal predecessors, (4114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:27,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1230 states to 1230 states and 4114 transitions. [2021-06-05 06:31:27,968 INFO L78 Accepts]: Start accepts. Automaton has 1230 states and 4114 transitions. Word has length 26 [2021-06-05 06:31:27,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:31:27,968 INFO L482 AbstractCegarLoop]: Abstraction has 1230 states and 4114 transitions. [2021-06-05 06:31:27,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:27,968 INFO L276 IsEmpty]: Start isEmpty. Operand 1230 states and 4114 transitions. [2021-06-05 06:31:27,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:31:27,970 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:31:27,970 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:31:28,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1667,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:31:28,186 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:31:28,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:31:28,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1167410081, now seen corresponding path program 8 times [2021-06-05 06:31:28,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:31:28,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597873824] [2021-06-05 06:31:28,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:31:28,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:31:28,358 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:31:28,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:31:28,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597873824] [2021-06-05 06:31:28,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597873824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:31:28,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294394853] [2021-06-05 06:31:28,358 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 06:31:28,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:31:28,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:31:28,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:31:28,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:31:28,546 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:28,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 51 [2021-06-05 06:31:28,579 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:31:28,595 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:28,605 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:28,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 43 [2021-06-05 06:31:28,647 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:31:28,670 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:28,691 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:28,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 06:31:28,696 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 06:31:28,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:28,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:31:28,797 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:59, output treesize:102 [2021-06-05 06:31:28,859 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:31:28,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294394853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:31:28,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:31:28,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 06:31:28,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019560601] [2021-06-05 06:31:28,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:31:28,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:31:28,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:31:28,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:31:28,860 INFO L87 Difference]: Start difference. First operand 1230 states and 4114 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:29,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:31:29,850 INFO L93 Difference]: Finished difference Result 1684 states and 5459 transitions. [2021-06-05 06:31:29,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 06:31:29,850 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:31:29,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:31:29,853 INFO L225 Difference]: With dead ends: 1684 [2021-06-05 06:31:29,853 INFO L226 Difference]: Without dead ends: 1669 [2021-06-05 06:31:29,853 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 872.0ms TimeCoverageRelationStatistics Valid=194, Invalid=996, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:31:29,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1669 states. [2021-06-05 06:31:29,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1669 to 1233. [2021-06-05 06:31:29,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1233 states, 1232 states have (on average 3.3490259740259742) internal successors, (4126), 1232 states have internal predecessors, (4126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:29,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1233 states to 1233 states and 4126 transitions. [2021-06-05 06:31:29,868 INFO L78 Accepts]: Start accepts. Automaton has 1233 states and 4126 transitions. Word has length 26 [2021-06-05 06:31:29,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:31:29,868 INFO L482 AbstractCegarLoop]: Abstraction has 1233 states and 4126 transitions. [2021-06-05 06:31:29,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:29,868 INFO L276 IsEmpty]: Start isEmpty. Operand 1233 states and 4126 transitions. [2021-06-05 06:31:29,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:31:29,870 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:31:29,870 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:31:30,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1668 [2021-06-05 06:31:30,071 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:31:30,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:31:30,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1190147507, now seen corresponding path program 9 times [2021-06-05 06:31:30,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:31:30,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303550357] [2021-06-05 06:31:30,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:31:30,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:31:30,209 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:31:30,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:31:30,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303550357] [2021-06-05 06:31:30,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303550357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:31:30,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182836786] [2021-06-05 06:31:30,209 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:31:30,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:31:30,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:31:30,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:31:30,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:31:30,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:31:30,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:31:30,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-06-05 06:31:30,415 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:31:30,422 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:30,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:31:30,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:31:30,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:31:30,426 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:31:30,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:30,438 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:30,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-05 06:31:30,440 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:31:30,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:30,450 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:31:30,450 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:52, output treesize:3 [2021-06-05 06:31:30,462 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:31:30,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182836786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:31:30,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:31:30,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 06:31:30,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613575733] [2021-06-05 06:31:30,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:31:30,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:31:30,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:31:30,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:31:30,463 INFO L87 Difference]: Start difference. First operand 1233 states and 4126 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:32,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:31:32,518 INFO L93 Difference]: Finished difference Result 1868 states and 6059 transitions. [2021-06-05 06:31:32,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 06:31:32,518 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:31:32,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:31:32,521 INFO L225 Difference]: With dead ends: 1868 [2021-06-05 06:31:32,521 INFO L226 Difference]: Without dead ends: 1853 [2021-06-05 06:31:32,521 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 613.5ms TimeCoverageRelationStatistics Valid=200, Invalid=792, Unknown=0, NotChecked=0, Total=992 [2021-06-05 06:31:32,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1853 states. [2021-06-05 06:31:32,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1853 to 1242. [2021-06-05 06:31:32,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1242 states, 1241 states have (on average 3.353746978243352) internal successors, (4162), 1241 states have internal predecessors, (4162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:32,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1242 states to 1242 states and 4162 transitions. [2021-06-05 06:31:32,537 INFO L78 Accepts]: Start accepts. Automaton has 1242 states and 4162 transitions. Word has length 26 [2021-06-05 06:31:32,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:31:32,538 INFO L482 AbstractCegarLoop]: Abstraction has 1242 states and 4162 transitions. [2021-06-05 06:31:32,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:32,538 INFO L276 IsEmpty]: Start isEmpty. Operand 1242 states and 4162 transitions. [2021-06-05 06:31:32,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:31:32,539 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:31:32,539 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:31:32,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1728,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:31:32,740 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:31:32,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:31:32,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1022338415, now seen corresponding path program 10 times [2021-06-05 06:31:32,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:31:32,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38996743] [2021-06-05 06:31:32,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:31:32,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:31:32,922 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:31:32,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:31:32,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38996743] [2021-06-05 06:31:32,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38996743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:31:32,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143182245] [2021-06-05 06:31:32,923 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:31:32,946 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:31:32,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:31:32,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:31:32,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:31:33,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:31:33,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:31:33,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-06-05 06:31:33,072 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:31:33,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:33,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:31:33,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:31:33,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:31:33,082 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:31:33,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:33,094 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:33,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-05 06:31:33,096 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:31:33,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:33,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:31:33,104 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-05 06:31:33,121 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:31:33,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143182245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:31:33,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:31:33,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 06:31:33,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758416756] [2021-06-05 06:31:33,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:31:33,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:31:33,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:31:33,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:31:33,122 INFO L87 Difference]: Start difference. First operand 1242 states and 4162 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:33,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:31:33,508 INFO L93 Difference]: Finished difference Result 1549 states and 5097 transitions. [2021-06-05 06:31:33,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:31:33,508 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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 26 [2021-06-05 06:31:33,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:31:33,511 INFO L225 Difference]: With dead ends: 1549 [2021-06-05 06:31:33,511 INFO L226 Difference]: Without dead ends: 1534 [2021-06-05 06:31:33,511 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 381.8ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:31:33,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1534 states. [2021-06-05 06:31:33,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1534 to 1238. [2021-06-05 06:31:33,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1238 states, 1237 states have (on average 3.3532740501212612) internal successors, (4148), 1237 states have internal predecessors, (4148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:33,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 4148 transitions. [2021-06-05 06:31:33,527 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 4148 transitions. Word has length 26 [2021-06-05 06:31:33,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:31:33,527 INFO L482 AbstractCegarLoop]: Abstraction has 1238 states and 4148 transitions. [2021-06-05 06:31:33,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:33,528 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 4148 transitions. [2021-06-05 06:31:33,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:31:33,529 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:31:33,529 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:31:33,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1729,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:31:33,730 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:31:33,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:31:33,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1045177613, now seen corresponding path program 11 times [2021-06-05 06:31:33,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:31:33,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731852008] [2021-06-05 06:31:33,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:31:33,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:31:33,877 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:31:33,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:31:33,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731852008] [2021-06-05 06:31:33,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731852008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:31:33,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786650616] [2021-06-05 06:31:33,877 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:31:33,901 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:31:33,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:31:33,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:31:33,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:31:34,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:31:34,018 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:34,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-06-05 06:31:34,034 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:31:34,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:34,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:31:34,051 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:34,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-05 06:31:34,067 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:31:34,081 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:34,097 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:34,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 06:31:34,102 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 06:31:34,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:34,150 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:31:34,150 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:54, output treesize:15 [2021-06-05 06:31:34,186 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:31:34,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786650616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:31:34,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:31:34,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 06:31:34,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403162770] [2021-06-05 06:31:34,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:31:34,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:31:34,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:31:34,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:31:34,187 INFO L87 Difference]: Start difference. First operand 1238 states and 4148 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:35,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:31:35,141 INFO L93 Difference]: Finished difference Result 2068 states and 6699 transitions. [2021-06-05 06:31:35,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:31:35,141 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:31:35,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:31:35,144 INFO L225 Difference]: With dead ends: 2068 [2021-06-05 06:31:35,144 INFO L226 Difference]: Without dead ends: 2053 [2021-06-05 06:31:35,145 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 779.2ms TimeCoverageRelationStatistics Valid=312, Invalid=1094, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 06:31:35,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2053 states. [2021-06-05 06:31:35,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2053 to 1238. [2021-06-05 06:31:35,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1238 states, 1237 states have (on average 3.3532740501212612) internal successors, (4148), 1237 states have internal predecessors, (4148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:35,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 4148 transitions. [2021-06-05 06:31:35,165 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 4148 transitions. Word has length 26 [2021-06-05 06:31:35,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:31:35,165 INFO L482 AbstractCegarLoop]: Abstraction has 1238 states and 4148 transitions. [2021-06-05 06:31:35,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:35,165 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 4148 transitions. [2021-06-05 06:31:35,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:31:35,167 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:31:35,167 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:31:35,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1730 [2021-06-05 06:31:35,368 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:31:35,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:31:35,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1541898973, now seen corresponding path program 12 times [2021-06-05 06:31:35,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:31:35,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101676962] [2021-06-05 06:31:35,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:31:35,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:31:35,570 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:31:35,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:31:35,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101676962] [2021-06-05 06:31:35,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101676962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:31:35,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326420823] [2021-06-05 06:31:35,571 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:31:35,595 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:31:35,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:31:35,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:31:35,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:31:35,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:31:35,717 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:35,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-06-05 06:31:35,732 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:31:35,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:35,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:31:35,747 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:35,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-05 06:31:35,765 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:31:35,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:35,792 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:35,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 06:31:35,797 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 06:31:35,832 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:35,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:31:35,852 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:49, output treesize:24 [2021-06-05 06:31:35,887 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:31:35,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326420823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:31:35,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:31:35,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 06:31:35,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128627423] [2021-06-05 06:31:35,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:31:35,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:31:35,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:31:35,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:31:35,888 INFO L87 Difference]: Start difference. First operand 1238 states and 4148 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:37,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:31:37,261 INFO L93 Difference]: Finished difference Result 1885 states and 6123 transitions. [2021-06-05 06:31:37,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:31:37,262 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:31:37,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:31:37,265 INFO L225 Difference]: With dead ends: 1885 [2021-06-05 06:31:37,265 INFO L226 Difference]: Without dead ends: 1870 [2021-06-05 06:31:37,265 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 1138.7ms TimeCoverageRelationStatistics Valid=312, Invalid=1410, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 06:31:37,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1870 states. [2021-06-05 06:31:37,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1870 to 1238. [2021-06-05 06:31:37,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1238 states, 1237 states have (on average 3.3532740501212612) internal successors, (4148), 1237 states have internal predecessors, (4148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:37,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 4148 transitions. [2021-06-05 06:31:37,283 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 4148 transitions. Word has length 26 [2021-06-05 06:31:37,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:31:37,283 INFO L482 AbstractCegarLoop]: Abstraction has 1238 states and 4148 transitions. [2021-06-05 06:31:37,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:37,283 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 4148 transitions. [2021-06-05 06:31:37,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:31:37,285 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:31:37,285 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:31:37,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1749,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:31:37,486 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:31:37,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:31:37,486 INFO L82 PathProgramCache]: Analyzing trace with hash -73165897, now seen corresponding path program 39 times [2021-06-05 06:31:37,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:31:37,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285013971] [2021-06-05 06:31:37,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:31:37,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:31:37,721 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:31:37,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:31:37,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285013971] [2021-06-05 06:31:37,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285013971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:31:37,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32768057] [2021-06-05 06:31:37,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:31:37,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:31:37,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:31:37,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:31:37,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:31:38,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:31:38,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:31:38,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:31:38,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:31:38,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-06-05 06:31:38,010 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:31:38,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:38,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:31:38,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:31:38,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:31:38,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:31:38,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 06:31:38,023 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:31:38,029 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:38,035 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:38,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-05 06:31:38,037 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:31:38,045 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:38,101 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:31:38,101 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-05 06:31:38,119 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:31:38,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32768057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:31:38,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:31:38,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 06:31:38,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822954397] [2021-06-05 06:31:38,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:31:38,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:31:38,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:31:38,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:31:38,120 INFO L87 Difference]: Start difference. First operand 1238 states and 4148 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:39,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:31:39,890 INFO L93 Difference]: Finished difference Result 2877 states and 8911 transitions. [2021-06-05 06:31:39,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 06:31:39,890 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:31:39,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:31:39,894 INFO L225 Difference]: With dead ends: 2877 [2021-06-05 06:31:39,894 INFO L226 Difference]: Without dead ends: 2832 [2021-06-05 06:31:39,894 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 845 ImplicationChecksByTransitivity, 1463.5ms TimeCoverageRelationStatistics Valid=545, Invalid=2535, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 06:31:39,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2832 states. [2021-06-05 06:31:39,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2832 to 1288. [2021-06-05 06:31:39,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1288 states, 1287 states have (on average 3.3737373737373737) internal successors, (4342), 1287 states have internal predecessors, (4342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:39,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 4342 transitions. [2021-06-05 06:31:39,915 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 4342 transitions. Word has length 26 [2021-06-05 06:31:39,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:31:39,915 INFO L482 AbstractCegarLoop]: Abstraction has 1288 states and 4342 transitions. [2021-06-05 06:31:39,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:39,915 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 4342 transitions. [2021-06-05 06:31:39,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:31:39,917 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:31:39,917 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:31:40,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1767 [2021-06-05 06:31:40,118 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:31:40,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:31:40,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1129146471, now seen corresponding path program 40 times [2021-06-05 06:31:40,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:31:40,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858044328] [2021-06-05 06:31:40,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:31:40,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:31:40,309 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:31:40,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:31:40,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858044328] [2021-06-05 06:31:40,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858044328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:31:40,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778135410] [2021-06-05 06:31:40,309 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:31:40,334 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:31:40,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:31:40,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:31:40,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:31:40,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:31:40,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:31:40,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:31:40,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-06-05 06:31:40,465 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:31:40,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:40,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:31:40,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:31:40,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:31:40,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 06:31:40,476 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:31:40,482 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:40,487 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:40,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-05 06:31:40,488 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:31:40,496 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:40,497 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:31:40,497 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-05 06:31:40,514 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:31:40,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778135410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:31:40,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:31:40,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 06:31:40,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059323835] [2021-06-05 06:31:40,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:31:40,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:31:40,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:31:40,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:31:40,515 INFO L87 Difference]: Start difference. First operand 1288 states and 4342 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:42,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:31:42,004 INFO L93 Difference]: Finished difference Result 2741 states and 8623 transitions. [2021-06-05 06:31:42,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 06:31:42,004 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:31:42,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:31:42,008 INFO L225 Difference]: With dead ends: 2741 [2021-06-05 06:31:42,008 INFO L226 Difference]: Without dead ends: 2696 [2021-06-05 06:31:42,008 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 1311.8ms TimeCoverageRelationStatistics Valid=485, Invalid=2065, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 06:31:42,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2696 states. [2021-06-05 06:31:42,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2696 to 1284. [2021-06-05 06:31:42,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1284 states, 1283 states have (on average 3.38269680436477) internal successors, (4340), 1283 states have internal predecessors, (4340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:42,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1284 states to 1284 states and 4340 transitions. [2021-06-05 06:31:42,034 INFO L78 Accepts]: Start accepts. Automaton has 1284 states and 4340 transitions. Word has length 26 [2021-06-05 06:31:42,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:31:42,034 INFO L482 AbstractCegarLoop]: Abstraction has 1284 states and 4340 transitions. [2021-06-05 06:31:42,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:42,034 INFO L276 IsEmpty]: Start isEmpty. Operand 1284 states and 4340 transitions. [2021-06-05 06:31:42,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:31:42,036 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:31:42,036 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:31:42,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1768,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:31:42,236 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:31:42,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:31:42,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1332172173, now seen corresponding path program 41 times [2021-06-05 06:31:42,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:31:42,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978068653] [2021-06-05 06:31:42,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:31:42,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:31:42,424 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:31:42,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:31:42,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978068653] [2021-06-05 06:31:42,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978068653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:31:42,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327533856] [2021-06-05 06:31:42,424 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:31:42,448 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:31:42,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:31:42,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:31:42,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:31:42,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:31:42,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:31:42,556 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:42,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 65 [2021-06-05 06:31:42,648 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 06:31:42,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:42,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:31:42,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:31:42,684 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:42,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 55 [2021-06-05 06:31:42,765 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 06:31:42,795 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:42,838 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:42,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 83 [2021-06-05 06:31:43,014 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 06:31:43,472 WARN L205 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 132 [2021-06-05 06:31:43,473 INFO L628 ElimStorePlain]: treesize reduction 198, result has 89.8 percent of original size [2021-06-05 06:31:43,754 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:31:43,754 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:56, output treesize:38 [2021-06-05 06:31:43,791 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:31:43,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327533856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:31:43,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:31:43,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 06:31:43,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674705960] [2021-06-05 06:31:43,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:31:43,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:31:43,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:31:43,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:31:43,791 INFO L87 Difference]: Start difference. First operand 1284 states and 4340 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:45,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:31:45,668 INFO L93 Difference]: Finished difference Result 3022 states and 9448 transitions. [2021-06-05 06:31:45,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 06:31:45,669 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:31:45,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:31:45,673 INFO L225 Difference]: With dead ends: 3022 [2021-06-05 06:31:45,673 INFO L226 Difference]: Without dead ends: 2977 [2021-06-05 06:31:45,673 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 1623.3ms TimeCoverageRelationStatistics Valid=567, Invalid=2295, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 06:31:45,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2977 states. [2021-06-05 06:31:45,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2977 to 1288. [2021-06-05 06:31:45,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1288 states, 1287 states have (on average 3.3885003885003884) internal successors, (4361), 1287 states have internal predecessors, (4361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:45,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 4361 transitions. [2021-06-05 06:31:45,697 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 4361 transitions. Word has length 26 [2021-06-05 06:31:45,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:31:45,697 INFO L482 AbstractCegarLoop]: Abstraction has 1288 states and 4361 transitions. [2021-06-05 06:31:45,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:45,697 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 4361 transitions. [2021-06-05 06:31:45,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:31:45,699 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:31:45,699 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:31:45,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1769 [2021-06-05 06:31:45,899 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:31:45,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:31:45,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1119783259, now seen corresponding path program 13 times [2021-06-05 06:31:45,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:31:45,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802198607] [2021-06-05 06:31:45,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:31:45,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:31:46,078 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:31:46,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:31:46,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802198607] [2021-06-05 06:31:46,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802198607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:31:46,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669322926] [2021-06-05 06:31:46,079 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:31:46,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:31:46,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:31:46,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:31:46,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:31:46,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:31:46,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-06-05 06:31:46,260 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:31:46,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:46,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:31:46,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:31:46,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:31:46,270 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:31:46,275 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:46,281 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:46,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-05 06:31:46,282 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:31:46,289 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:46,291 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:31:46,291 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-05 06:31:46,304 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:31:46,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669322926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:31:46,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:31:46,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 06:31:46,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607875820] [2021-06-05 06:31:46,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:31:46,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:31:46,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:31:46,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:31:46,305 INFO L87 Difference]: Start difference. First operand 1288 states and 4361 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:46,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:31:46,715 INFO L93 Difference]: Finished difference Result 1650 states and 5461 transitions. [2021-06-05 06:31:46,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:31:46,715 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:31:46,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:31:46,718 INFO L225 Difference]: With dead ends: 1650 [2021-06-05 06:31:46,718 INFO L226 Difference]: Without dead ends: 1635 [2021-06-05 06:31:46,718 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 483.2ms TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:31:46,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2021-06-05 06:31:46,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1297. [2021-06-05 06:31:46,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1297 states, 1296 states have (on average 3.388117283950617) internal successors, (4391), 1296 states have internal predecessors, (4391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:46,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1297 states to 1297 states and 4391 transitions. [2021-06-05 06:31:46,734 INFO L78 Accepts]: Start accepts. Automaton has 1297 states and 4391 transitions. Word has length 26 [2021-06-05 06:31:46,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:31:46,734 INFO L482 AbstractCegarLoop]: Abstraction has 1297 states and 4391 transitions. [2021-06-05 06:31:46,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:46,734 INFO L276 IsEmpty]: Start isEmpty. Operand 1297 states and 4391 transitions. [2021-06-05 06:31:46,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:31:46,736 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:31:46,736 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:31:46,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1893 [2021-06-05 06:31:46,937 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:31:46,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:31:46,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1448942831, now seen corresponding path program 14 times [2021-06-05 06:31:46,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:31:46,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129519107] [2021-06-05 06:31:46,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:31:46,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:31:47,097 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:31:47,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:31:47,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129519107] [2021-06-05 06:31:47,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129519107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:31:47,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695637161] [2021-06-05 06:31:47,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:31:47,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:31:47,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:31:47,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:31:47,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:31:47,282 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:47,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 51 [2021-06-05 06:31:47,321 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:31:47,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:47,346 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:47,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 43 [2021-06-05 06:31:47,378 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:31:47,399 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:47,430 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:47,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 06:31:47,435 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 06:31:47,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:47,534 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:31:47,534 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:59, output treesize:75 [2021-06-05 06:31:47,592 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:31:47,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695637161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:31:47,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:31:47,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 06:31:47,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654434172] [2021-06-05 06:31:47,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:31:47,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:31:47,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:31:47,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:31:47,593 INFO L87 Difference]: Start difference. First operand 1297 states and 4391 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:48,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:31:48,691 INFO L93 Difference]: Finished difference Result 2002 states and 6515 transitions. [2021-06-05 06:31:48,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 06:31:48,692 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:31:48,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:31:48,695 INFO L225 Difference]: With dead ends: 2002 [2021-06-05 06:31:48,695 INFO L226 Difference]: Without dead ends: 1987 [2021-06-05 06:31:48,695 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 862.0ms TimeCoverageRelationStatistics Valid=198, Invalid=1208, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 06:31:48,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1987 states. [2021-06-05 06:31:48,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1987 to 1289. [2021-06-05 06:31:48,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1289 states, 1288 states have (on average 3.3975155279503104) internal successors, (4376), 1288 states have internal predecessors, (4376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:48,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1289 states to 1289 states and 4376 transitions. [2021-06-05 06:31:48,716 INFO L78 Accepts]: Start accepts. Automaton has 1289 states and 4376 transitions. Word has length 26 [2021-06-05 06:31:48,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:31:48,716 INFO L482 AbstractCegarLoop]: Abstraction has 1289 states and 4376 transitions. [2021-06-05 06:31:48,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:48,716 INFO L276 IsEmpty]: Start isEmpty. Operand 1289 states and 4376 transitions. [2021-06-05 06:31:48,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:31:48,718 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:31:48,718 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:31:48,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1894,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:31:48,919 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:31:48,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:31:48,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1281133739, now seen corresponding path program 15 times [2021-06-05 06:31:48,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:31:48,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718273599] [2021-06-05 06:31:48,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:31:48,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:31:49,110 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:31:49,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:31:49,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718273599] [2021-06-05 06:31:49,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718273599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:31:49,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032368380] [2021-06-05 06:31:49,111 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:31:49,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:31:49,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:31:49,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:31:49,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:31:49,318 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:49,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 59 [2021-06-05 06:31:49,378 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:31:49,398 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:49,413 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:49,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 51 [2021-06-05 06:31:49,485 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:31:49,518 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:49,538 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:49,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 06:31:49,543 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 06:31:49,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:49,730 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 16 xjuncts. [2021-06-05 06:31:49,730 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:59, output treesize:617 [2021-06-05 06:31:50,084 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 53 [2021-06-05 06:31:50,224 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:31:50,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032368380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:31:50,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:31:50,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-06-05 06:31:50,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904229616] [2021-06-05 06:31:50,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:31:50,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:31:50,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:31:50,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:31:50,224 INFO L87 Difference]: Start difference. First operand 1289 states and 4376 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:53,617 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2021-06-05 06:31:56,008 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 69 [2021-06-05 06:32:02,030 WARN L205 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 50 [2021-06-05 06:32:03,181 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44 [2021-06-05 06:32:03,335 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 59 [2021-06-05 06:32:03,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:32:03,394 INFO L93 Difference]: Finished difference Result 1952 states and 6311 transitions. [2021-06-05 06:32:03,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 06:32:03,394 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:32:03,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:32:03,397 INFO L225 Difference]: With dead ends: 1952 [2021-06-05 06:32:03,397 INFO L226 Difference]: Without dead ends: 1937 [2021-06-05 06:32:03,398 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 11403.6ms TimeCoverageRelationStatistics Valid=313, Invalid=1754, Unknown=3, NotChecked=0, Total=2070 [2021-06-05 06:32:03,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1937 states. [2021-06-05 06:32:03,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1937 to 1302. [2021-06-05 06:32:03,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1302 states, 1301 states have (on average 3.4027671022290544) internal successors, (4427), 1301 states have internal predecessors, (4427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:03,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 4427 transitions. [2021-06-05 06:32:03,417 INFO L78 Accepts]: Start accepts. Automaton has 1302 states and 4427 transitions. Word has length 26 [2021-06-05 06:32:03,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:32:03,417 INFO L482 AbstractCegarLoop]: Abstraction has 1302 states and 4427 transitions. [2021-06-05 06:32:03,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:03,418 INFO L276 IsEmpty]: Start isEmpty. Operand 1302 states and 4427 transitions. [2021-06-05 06:32:03,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:32:03,419 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:32:03,420 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:32:03,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1950 [2021-06-05 06:32:03,636 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:32:03,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:32:03,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1261165713, now seen corresponding path program 16 times [2021-06-05 06:32:03,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:32:03,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115632821] [2021-06-05 06:32:03,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:32:03,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:32:03,844 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:32:03,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:32:03,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115632821] [2021-06-05 06:32:03,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115632821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:32:03,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623234394] [2021-06-05 06:32:03,845 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:32:03,870 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:32:03,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:32:03,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:32:03,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:32:03,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:32:03,977 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:03,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-06-05 06:32:03,994 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:32:04,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:04,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:32:04,022 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:04,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-05 06:32:04,038 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:32:04,055 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:04,076 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:04,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 06:32:04,086 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 06:32:04,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:04,145 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:32:04,145 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:55, output treesize:17 [2021-06-05 06:32:04,185 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:32:04,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623234394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:32:04,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:32:04,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 06:32:04,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200095842] [2021-06-05 06:32:04,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:32:04,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:32:04,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:32:04,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:32:04,186 INFO L87 Difference]: Start difference. First operand 1302 states and 4427 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:04,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:32:04,503 INFO L93 Difference]: Finished difference Result 1783 states and 5883 transitions. [2021-06-05 06:32:04,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:32:04,503 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 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 26 [2021-06-05 06:32:04,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:32:04,506 INFO L225 Difference]: With dead ends: 1783 [2021-06-05 06:32:04,506 INFO L226 Difference]: Without dead ends: 1768 [2021-06-05 06:32:04,506 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 390.3ms TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:32:04,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1768 states. [2021-06-05 06:32:04,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1768 to 1298. [2021-06-05 06:32:04,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1298 states, 1297 states have (on average 3.397070161912105) internal successors, (4406), 1297 states have internal predecessors, (4406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:04,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1298 states to 1298 states and 4406 transitions. [2021-06-05 06:32:04,523 INFO L78 Accepts]: Start accepts. Automaton has 1298 states and 4406 transitions. Word has length 26 [2021-06-05 06:32:04,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:32:04,523 INFO L482 AbstractCegarLoop]: Abstraction has 1298 states and 4406 transitions. [2021-06-05 06:32:04,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:04,523 INFO L276 IsEmpty]: Start isEmpty. Operand 1298 states and 4406 transitions. [2021-06-05 06:32:04,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:32:04,528 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:32:04,528 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:32:04,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2048,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:32:04,737 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:32:04,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:32:04,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1283103649, now seen corresponding path program 17 times [2021-06-05 06:32:04,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:32:04,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040930225] [2021-06-05 06:32:04,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:32:04,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:32:04,938 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:32:04,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:32:04,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040930225] [2021-06-05 06:32:04,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040930225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:32:04,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801026677] [2021-06-05 06:32:04,939 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 06:32:04,980 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:32:04,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:32:04,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:32:04,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:32:05,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:32:05,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:32:05,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-06-05 06:32:05,158 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:32:05,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:05,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:32:05,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:32:05,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:32:05,170 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:32:05,176 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:05,182 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:05,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-05 06:32:05,183 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:32:05,190 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:05,192 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:32:05,192 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-05 06:32:05,207 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:32:05,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801026677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:32:05,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:32:05,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 06:32:05,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886426333] [2021-06-05 06:32:05,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:32:05,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:32:05,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:32:05,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:32:05,208 INFO L87 Difference]: Start difference. First operand 1298 states and 4406 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:06,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:32:06,219 INFO L93 Difference]: Finished difference Result 1768 states and 5860 transitions. [2021-06-05 06:32:06,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 06:32:06,219 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:32:06,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:32:06,222 INFO L225 Difference]: With dead ends: 1768 [2021-06-05 06:32:06,222 INFO L226 Difference]: Without dead ends: 1753 [2021-06-05 06:32:06,223 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 835.6ms TimeCoverageRelationStatistics Valid=214, Invalid=1046, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 06:32:06,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1753 states. [2021-06-05 06:32:06,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1753 to 1301. [2021-06-05 06:32:06,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1301 states, 1300 states have (on average 3.3984615384615386) internal successors, (4418), 1300 states have internal predecessors, (4418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:06,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1301 states to 1301 states and 4418 transitions. [2021-06-05 06:32:06,240 INFO L78 Accepts]: Start accepts. Automaton has 1301 states and 4418 transitions. Word has length 26 [2021-06-05 06:32:06,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:32:06,240 INFO L482 AbstractCegarLoop]: Abstraction has 1301 states and 4418 transitions. [2021-06-05 06:32:06,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:06,240 INFO L276 IsEmpty]: Start isEmpty. Operand 1301 states and 4418 transitions. [2021-06-05 06:32:06,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:32:06,242 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:32:06,242 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:32:06,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2067 [2021-06-05 06:32:06,443 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:32:06,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:32:06,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1394330867, now seen corresponding path program 18 times [2021-06-05 06:32:06,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:32:06,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227141029] [2021-06-05 06:32:06,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:32:06,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:32:06,620 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:32:06,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:32:06,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227141029] [2021-06-05 06:32:06,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227141029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:32:06,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661435276] [2021-06-05 06:32:06,620 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:32:06,647 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:32:06,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:32:06,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:32:06,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:32:06,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:32:06,776 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:06,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-06-05 06:32:06,795 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:32:06,806 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:06,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:32:06,813 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:06,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-05 06:32:06,830 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:32:06,848 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:06,864 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:06,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 06:32:06,869 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 06:32:06,910 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:06,923 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:32:06,923 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:54, output treesize:36 [2021-06-05 06:32:06,961 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:32:06,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661435276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:32:06,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:32:06,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 06:32:06,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875142421] [2021-06-05 06:32:06,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:32:06,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:32:06,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:32:06,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:32:06,962 INFO L87 Difference]: Start difference. First operand 1301 states and 4418 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:07,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:32:07,753 INFO L93 Difference]: Finished difference Result 2171 states and 7095 transitions. [2021-06-05 06:32:07,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 06:32:07,753 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:32:07,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:32:07,756 INFO L225 Difference]: With dead ends: 2171 [2021-06-05 06:32:07,756 INFO L226 Difference]: Without dead ends: 2156 [2021-06-05 06:32:07,756 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 717.5ms TimeCoverageRelationStatistics Valid=261, Invalid=999, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 06:32:07,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2156 states. [2021-06-05 06:32:07,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2156 to 1295. [2021-06-05 06:32:07,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1295 states, 1294 states have (on average 3.3956723338485317) internal successors, (4394), 1294 states have internal predecessors, (4394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:07,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1295 states to 1295 states and 4394 transitions. [2021-06-05 06:32:07,774 INFO L78 Accepts]: Start accepts. Automaton has 1295 states and 4394 transitions. Word has length 26 [2021-06-05 06:32:07,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:32:07,774 INFO L482 AbstractCegarLoop]: Abstraction has 1295 states and 4394 transitions. [2021-06-05 06:32:07,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:07,775 INFO L276 IsEmpty]: Start isEmpty. Operand 1295 states and 4394 transitions. [2021-06-05 06:32:07,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:32:07,776 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:32:07,776 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:32:07,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2068 [2021-06-05 06:32:07,991 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:32:07,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:32:07,991 INFO L82 PathProgramCache]: Analyzing trace with hash 911449975, now seen corresponding path program 19 times [2021-06-05 06:32:07,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:32:07,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145384287] [2021-06-05 06:32:07,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:32:07,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:32:08,189 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:32:08,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:32:08,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145384287] [2021-06-05 06:32:08,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145384287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:32:08,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944457433] [2021-06-05 06:32:08,189 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:32:08,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:32:08,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:32:08,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:32:08,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:32:08,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:32:08,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-06-05 06:32:08,371 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:32:08,377 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:08,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:32:08,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:32:08,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:32:08,381 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:32:08,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:08,393 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:08,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-05 06:32:08,395 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:32:08,402 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:08,403 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:32:08,403 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-05 06:32:08,416 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:32:08,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944457433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:32:08,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:32:08,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 06:32:08,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524911416] [2021-06-05 06:32:08,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:32:08,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:32:08,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:32:08,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:32:08,417 INFO L87 Difference]: Start difference. First operand 1295 states and 4394 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:08,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:32:08,834 INFO L93 Difference]: Finished difference Result 1728 states and 5699 transitions. [2021-06-05 06:32:08,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:32:08,835 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:32:08,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:32:08,837 INFO L225 Difference]: With dead ends: 1728 [2021-06-05 06:32:08,837 INFO L226 Difference]: Without dead ends: 1707 [2021-06-05 06:32:08,837 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 463.0ms TimeCoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:32:08,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2021-06-05 06:32:08,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 1336. [2021-06-05 06:32:08,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1336 states, 1335 states have (on average 3.390262172284644) internal successors, (4526), 1335 states have internal predecessors, (4526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:08,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1336 states to 1336 states and 4526 transitions. [2021-06-05 06:32:08,853 INFO L78 Accepts]: Start accepts. Automaton has 1336 states and 4526 transitions. Word has length 26 [2021-06-05 06:32:08,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:32:08,853 INFO L482 AbstractCegarLoop]: Abstraction has 1336 states and 4526 transitions. [2021-06-05 06:32:08,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:08,854 INFO L276 IsEmpty]: Start isEmpty. Operand 1336 states and 4526 transitions. [2021-06-05 06:32:08,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:32:08,855 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:32:08,855 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:32:09,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2087,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:32:09,068 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:32:09,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:32:09,069 INFO L82 PathProgramCache]: Analyzing trace with hash 743640883, now seen corresponding path program 20 times [2021-06-05 06:32:09,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:32:09,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547616486] [2021-06-05 06:32:09,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:32:09,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:32:09,254 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:32:09,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:32:09,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547616486] [2021-06-05 06:32:09,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547616486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:32:09,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340895842] [2021-06-05 06:32:09,254 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:32:09,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:32:09,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:32:09,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 06:32:09,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:32:09,413 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:09,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 51 [2021-06-05 06:32:09,446 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:32:09,461 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:09,472 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:09,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 43 [2021-06-05 06:32:09,509 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:32:09,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:09,558 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:09,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 06:32:09,577 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 06:32:09,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:09,691 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:32:09,691 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:57, output treesize:184 [2021-06-05 06:32:09,787 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:32:09,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340895842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:32:09,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:32:09,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-06-05 06:32:09,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857482579] [2021-06-05 06:32:09,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:32:09,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:32:09,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:32:09,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:32:09,788 INFO L87 Difference]: Start difference. First operand 1336 states and 4526 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:10,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:32:10,891 INFO L93 Difference]: Finished difference Result 1950 states and 6250 transitions. [2021-06-05 06:32:10,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 06:32:10,891 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:32:10,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:32:10,894 INFO L225 Difference]: With dead ends: 1950 [2021-06-05 06:32:10,894 INFO L226 Difference]: Without dead ends: 1925 [2021-06-05 06:32:10,894 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1009.7ms TimeCoverageRelationStatistics Valid=226, Invalid=1256, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 06:32:10,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1925 states. [2021-06-05 06:32:10,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1925 to 1350. [2021-06-05 06:32:10,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1350 states, 1349 states have (on average 3.3995552260934025) internal successors, (4586), 1349 states have internal predecessors, (4586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:10,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1350 states to 1350 states and 4586 transitions. [2021-06-05 06:32:10,913 INFO L78 Accepts]: Start accepts. Automaton has 1350 states and 4586 transitions. Word has length 26 [2021-06-05 06:32:10,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:32:10,913 INFO L482 AbstractCegarLoop]: Abstraction has 1350 states and 4586 transitions. [2021-06-05 06:32:10,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:10,913 INFO L276 IsEmpty]: Start isEmpty. Operand 1350 states and 4586 transitions. [2021-06-05 06:32:10,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:32:10,915 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:32:10,915 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:32:11,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2088,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:32:11,115 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:32:11,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:32:11,116 INFO L82 PathProgramCache]: Analyzing trace with hash 723672857, now seen corresponding path program 21 times [2021-06-05 06:32:11,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:32:11,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639202085] [2021-06-05 06:32:11,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:32:11,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:32:11,324 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:32:11,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:32:11,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639202085] [2021-06-05 06:32:11,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639202085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:32:11,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494164819] [2021-06-05 06:32:11,324 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:32:11,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:32:11,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:32:11,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:32:11,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:32:11,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:32:11,559 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:11,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-06-05 06:32:11,576 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:32:11,588 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:11,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:32:11,595 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:11,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-05 06:32:11,610 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:32:11,625 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:11,642 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:11,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 06:32:11,647 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 06:32:11,684 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:11,696 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:32:11,696 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:52, output treesize:19 [2021-06-05 06:32:11,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:32:11,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494164819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:32:11,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:32:11,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 06:32:11,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949596820] [2021-06-05 06:32:11,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:32:11,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:32:11,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:32:11,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:32:11,736 INFO L87 Difference]: Start difference. First operand 1350 states and 4586 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:12,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:32:12,438 INFO L93 Difference]: Finished difference Result 1841 states and 6067 transitions. [2021-06-05 06:32:12,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 06:32:12,439 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:32:12,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:32:12,441 INFO L225 Difference]: With dead ends: 1841 [2021-06-05 06:32:12,442 INFO L226 Difference]: Without dead ends: 1812 [2021-06-05 06:32:12,442 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 694.4ms TimeCoverageRelationStatistics Valid=192, Invalid=800, Unknown=0, NotChecked=0, Total=992 [2021-06-05 06:32:12,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1812 states. [2021-06-05 06:32:12,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1812 to 1353. [2021-06-05 06:32:12,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1353 states, 1352 states have (on average 3.400147928994083) internal successors, (4597), 1352 states have internal predecessors, (4597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:12,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1353 states to 1353 states and 4597 transitions. [2021-06-05 06:32:12,459 INFO L78 Accepts]: Start accepts. Automaton has 1353 states and 4597 transitions. Word has length 26 [2021-06-05 06:32:12,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:32:12,459 INFO L482 AbstractCegarLoop]: Abstraction has 1353 states and 4597 transitions. [2021-06-05 06:32:12,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:12,459 INFO L276 IsEmpty]: Start isEmpty. Operand 1353 states and 4597 transitions. [2021-06-05 06:32:12,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:32:12,461 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:32:12,461 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:32:12,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2139 [2021-06-05 06:32:12,662 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:32:12,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:32:12,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1042414331, now seen corresponding path program 22 times [2021-06-05 06:32:12,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:32:12,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566418722] [2021-06-05 06:32:12,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:32:12,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:32:12,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:32:12,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:32:12,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566418722] [2021-06-05 06:32:12,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566418722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:32:12,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017041934] [2021-06-05 06:32:12,869 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:32:12,894 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:32:12,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:32:12,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:32:12,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:32:13,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:32:13,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:32:13,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-06-05 06:32:13,038 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:32:13,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:13,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:32:13,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:32:13,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:32:13,048 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:32:13,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:13,060 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:13,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-05 06:32:13,061 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:32:13,068 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:13,070 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:32:13,070 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-05 06:32:13,087 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:32:13,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017041934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:32:13,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:32:13,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 06:32:13,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723382504] [2021-06-05 06:32:13,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:32:13,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:32:13,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:32:13,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:32:13,088 INFO L87 Difference]: Start difference. First operand 1353 states and 4597 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:13,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:32:13,355 INFO L93 Difference]: Finished difference Result 1466 states and 4903 transitions. [2021-06-05 06:32:13,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 06:32:13,356 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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 26 [2021-06-05 06:32:13,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:32:13,358 INFO L225 Difference]: With dead ends: 1466 [2021-06-05 06:32:13,358 INFO L226 Difference]: Without dead ends: 1451 [2021-06-05 06:32:13,358 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 327.3ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:32:13,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1451 states. [2021-06-05 06:32:13,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1451 to 1359. [2021-06-05 06:32:13,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1359 states, 1358 states have (on average 3.402061855670103) internal successors, (4620), 1358 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:13,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1359 states to 1359 states and 4620 transitions. [2021-06-05 06:32:13,374 INFO L78 Accepts]: Start accepts. Automaton has 1359 states and 4620 transitions. Word has length 26 [2021-06-05 06:32:13,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:32:13,374 INFO L482 AbstractCegarLoop]: Abstraction has 1359 states and 4620 transitions. [2021-06-05 06:32:13,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:13,374 INFO L276 IsEmpty]: Start isEmpty. Operand 1359 states and 4620 transitions. [2021-06-05 06:32:13,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:32:13,376 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:32:13,376 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:32:13,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2158,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:32:13,589 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:32:13,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:32:13,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1681727365, now seen corresponding path program 23 times [2021-06-05 06:32:13,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:32:13,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884876736] [2021-06-05 06:32:13,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:32:13,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:32:13,762 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:32:13,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:32:13,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884876736] [2021-06-05 06:32:13,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884876736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:32:13,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743260986] [2021-06-05 06:32:13,763 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:32:13,787 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:32:13,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:32:13,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:32:13,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:32:16,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:32:16,146 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:16,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-06-05 06:32:16,162 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:32:16,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:16,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:32:16,180 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:16,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-05 06:32:16,196 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:32:16,210 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:16,227 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:16,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 06:32:16,231 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 06:32:16,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:16,287 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:32:16,287 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:52, output treesize:15 [2021-06-05 06:32:16,325 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:32:16,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743260986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:32:16,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:32:16,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 06:32:16,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397236057] [2021-06-05 06:32:16,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:32:16,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:32:16,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:32:16,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=277, Unknown=2, NotChecked=0, Total=342 [2021-06-05 06:32:16,326 INFO L87 Difference]: Start difference. First operand 1359 states and 4620 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:16,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:32:16,991 INFO L93 Difference]: Finished difference Result 1987 states and 6490 transitions. [2021-06-05 06:32:16,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 06:32:16,991 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:32:16,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:32:16,994 INFO L225 Difference]: With dead ends: 1987 [2021-06-05 06:32:16,994 INFO L226 Difference]: Without dead ends: 1937 [2021-06-05 06:32:16,994 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 2841.8ms TimeCoverageRelationStatistics Valid=191, Invalid=863, Unknown=2, NotChecked=0, Total=1056 [2021-06-05 06:32:16,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1937 states. [2021-06-05 06:32:17,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1937 to 1366. [2021-06-05 06:32:17,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1366 states, 1365 states have (on average 3.4065934065934065) internal successors, (4650), 1365 states have internal predecessors, (4650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:17,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1366 states to 1366 states and 4650 transitions. [2021-06-05 06:32:17,014 INFO L78 Accepts]: Start accepts. Automaton has 1366 states and 4650 transitions. Word has length 26 [2021-06-05 06:32:17,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:32:17,014 INFO L482 AbstractCegarLoop]: Abstraction has 1366 states and 4650 transitions. [2021-06-05 06:32:17,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:17,014 INFO L276 IsEmpty]: Start isEmpty. Operand 1366 states and 4650 transitions. [2021-06-05 06:32:17,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:32:17,016 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:32:17,016 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:32:17,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2159 [2021-06-05 06:32:17,217 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:32:17,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:32:17,217 INFO L82 PathProgramCache]: Analyzing trace with hash 508379419, now seen corresponding path program 24 times [2021-06-05 06:32:17,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:32:17,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491538462] [2021-06-05 06:32:17,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:32:17,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:32:17,403 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:32:17,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:32:17,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491538462] [2021-06-05 06:32:17,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491538462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:32:17,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239424760] [2021-06-05 06:32:17,404 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:32:17,428 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:32:17,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:32:17,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:32:17,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:32:17,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:32:17,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:32:17,547 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:17,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 53 [2021-06-05 06:32:17,564 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:32:17,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:17,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:32:17,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:32:17,580 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:17,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 41 [2021-06-05 06:32:17,601 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:32:17,614 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:17,640 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:17,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 53 [2021-06-05 06:32:17,645 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 06:32:17,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:17,696 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:32:17,696 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:65, output treesize:17 [2021-06-05 06:32:17,728 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:32:17,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239424760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:32:17,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:32:17,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 06:32:17,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252483090] [2021-06-05 06:32:17,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:32:17,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:32:17,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:32:17,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:32:17,729 INFO L87 Difference]: Start difference. First operand 1366 states and 4650 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:18,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:32:18,393 INFO L93 Difference]: Finished difference Result 1843 states and 6121 transitions. [2021-06-05 06:32:18,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 06:32:18,393 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:32:18,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:32:18,396 INFO L225 Difference]: With dead ends: 1843 [2021-06-05 06:32:18,396 INFO L226 Difference]: Without dead ends: 1824 [2021-06-05 06:32:18,396 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 631.4ms TimeCoverageRelationStatistics Valid=192, Invalid=930, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 06:32:18,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1824 states. [2021-06-05 06:32:18,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1824 to 1378. [2021-06-05 06:32:18,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1378 states, 1377 states have (on average 3.4095860566448803) internal successors, (4695), 1377 states have internal predecessors, (4695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:18,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1378 states to 1378 states and 4695 transitions. [2021-06-05 06:32:18,414 INFO L78 Accepts]: Start accepts. Automaton has 1378 states and 4695 transitions. Word has length 26 [2021-06-05 06:32:18,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:32:18,414 INFO L482 AbstractCegarLoop]: Abstraction has 1378 states and 4695 transitions. [2021-06-05 06:32:18,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:18,414 INFO L276 IsEmpty]: Start isEmpty. Operand 1378 states and 4695 transitions. [2021-06-05 06:32:18,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:32:18,416 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:32:18,416 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:32:18,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2178 [2021-06-05 06:32:18,632 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:32:18,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:32:18,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1495871031, now seen corresponding path program 25 times [2021-06-05 06:32:18,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:32:18,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250304060] [2021-06-05 06:32:18,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:32:18,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:32:18,781 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:32:18,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:32:18,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250304060] [2021-06-05 06:32:18,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250304060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:32:18,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133520130] [2021-06-05 06:32:18,782 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:32:18,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:32:18,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:32:18,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:32:18,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:32:18,922 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:18,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-06-05 06:32:18,937 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:32:18,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:18,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:32:18,954 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:18,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-05 06:32:18,969 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:32:18,983 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:19,000 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:19,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 06:32:19,010 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 06:32:19,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:19,065 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:32:19,065 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:54, output treesize:19 [2021-06-05 06:32:19,101 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:32:19,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133520130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:32:19,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:32:19,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 06:32:19,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731147697] [2021-06-05 06:32:19,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:32:19,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:32:19,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:32:19,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:32:19,102 INFO L87 Difference]: Start difference. First operand 1378 states and 4695 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:19,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:32:19,618 INFO L93 Difference]: Finished difference Result 1965 states and 6485 transitions. [2021-06-05 06:32:19,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 06:32:19,618 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:32:19,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:32:19,621 INFO L225 Difference]: With dead ends: 1965 [2021-06-05 06:32:19,621 INFO L226 Difference]: Without dead ends: 1940 [2021-06-05 06:32:19,621 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 461.4ms TimeCoverageRelationStatistics Valid=185, Invalid=745, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:32:19,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1940 states. [2021-06-05 06:32:19,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1940 to 1378. [2021-06-05 06:32:19,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1378 states, 1377 states have (on average 3.4095860566448803) internal successors, (4695), 1377 states have internal predecessors, (4695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:19,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1378 states to 1378 states and 4695 transitions. [2021-06-05 06:32:19,649 INFO L78 Accepts]: Start accepts. Automaton has 1378 states and 4695 transitions. Word has length 26 [2021-06-05 06:32:19,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:32:19,649 INFO L482 AbstractCegarLoop]: Abstraction has 1378 states and 4695 transitions. [2021-06-05 06:32:19,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:19,650 INFO L276 IsEmpty]: Start isEmpty. Operand 1378 states and 4695 transitions. [2021-06-05 06:32:19,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:32:19,651 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:32:19,651 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:32:19,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2195,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:32:19,852 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:32:19,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:32:19,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1425327497, now seen corresponding path program 42 times [2021-06-05 06:32:19,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:32:19,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767018103] [2021-06-05 06:32:19,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:32:19,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:32:20,056 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:32:20,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:32:20,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767018103] [2021-06-05 06:32:20,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767018103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:32:20,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537151847] [2021-06-05 06:32:20,056 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:32:20,079 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:32:20,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:32:20,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:32:20,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:32:20,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:32:20,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:32:20,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:32:20,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-06-05 06:32:20,202 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:32:20,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:20,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:32:20,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:32:20,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:32:20,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 06:32:20,215 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:32:20,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:20,226 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:20,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-05 06:32:20,227 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:32:20,235 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:20,236 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:32:20,236 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-05 06:32:20,248 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:32:20,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537151847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:32:20,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:32:20,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 06:32:20,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990153627] [2021-06-05 06:32:20,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:32:20,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:32:20,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:32:20,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:32:20,249 INFO L87 Difference]: Start difference. First operand 1378 states and 4695 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:21,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:32:21,147 INFO L93 Difference]: Finished difference Result 1798 states and 5944 transitions. [2021-06-05 06:32:21,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 06:32:21,148 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:32:21,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:32:21,150 INFO L225 Difference]: With dead ends: 1798 [2021-06-05 06:32:21,150 INFO L226 Difference]: Without dead ends: 1772 [2021-06-05 06:32:21,151 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 909.4ms TimeCoverageRelationStatistics Valid=284, Invalid=1198, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 06:32:21,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1772 states. [2021-06-05 06:32:21,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1772 to 1390. [2021-06-05 06:32:21,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1390 states, 1389 states have (on average 3.4046076313894886) internal successors, (4729), 1389 states have internal predecessors, (4729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:21,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1390 states to 1390 states and 4729 transitions. [2021-06-05 06:32:21,167 INFO L78 Accepts]: Start accepts. Automaton has 1390 states and 4729 transitions. Word has length 26 [2021-06-05 06:32:21,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:32:21,167 INFO L482 AbstractCegarLoop]: Abstraction has 1390 states and 4729 transitions. [2021-06-05 06:32:21,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:21,167 INFO L276 IsEmpty]: Start isEmpty. Operand 1390 states and 4729 transitions. [2021-06-05 06:32:21,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:32:21,169 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:32:21,169 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:32:21,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2214,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:32:21,369 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:32:21,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:32:21,370 INFO L82 PathProgramCache]: Analyzing trace with hash -357452933, now seen corresponding path program 43 times [2021-06-05 06:32:21,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:32:21,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402086388] [2021-06-05 06:32:21,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:32:21,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:32:21,590 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:32:21,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:32:21,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402086388] [2021-06-05 06:32:21,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402086388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:32:21,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644942557] [2021-06-05 06:32:21,590 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:32:21,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:32:21,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:32:21,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:32:24,265 WARN L205 SmtUtils]: Spent 985.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-06-05 06:32:24,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:32:24,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:32:24,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:32:24,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-06-05 06:32:24,276 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:32:24,284 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:24,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:32:24,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:32:24,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:32:24,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 06:32:24,288 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:32:24,294 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:24,300 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:24,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-05 06:32:24,302 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:32:24,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:24,311 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:32:24,311 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-05 06:32:24,327 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:32:24,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644942557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:32:24,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:32:24,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-05 06:32:24,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831986904] [2021-06-05 06:32:24,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:32:24,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:32:24,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:32:24,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=215, Unknown=2, NotChecked=0, Total=272 [2021-06-05 06:32:24,328 INFO L87 Difference]: Start difference. First operand 1390 states and 4729 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:46,417 WARN L205 SmtUtils]: Spent 773.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-06-05 06:32:48,012 WARN L205 SmtUtils]: Spent 803.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-06-05 06:32:49,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:32:49,101 INFO L93 Difference]: Finished difference Result 1990 states and 6587 transitions. [2021-06-05 06:32:49,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 06:32:49,101 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:32:49,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:32:49,104 INFO L225 Difference]: With dead ends: 1990 [2021-06-05 06:32:49,104 INFO L226 Difference]: Without dead ends: 1975 [2021-06-05 06:32:49,104 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 10456.5ms TimeCoverageRelationStatistics Valid=336, Invalid=1378, Unknown=8, NotChecked=0, Total=1722 [2021-06-05 06:32:49,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1975 states. [2021-06-05 06:32:49,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1975 to 1390. [2021-06-05 06:32:49,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1390 states, 1389 states have (on average 3.4046076313894886) internal successors, (4729), 1389 states have internal predecessors, (4729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:49,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1390 states to 1390 states and 4729 transitions. [2021-06-05 06:32:49,122 INFO L78 Accepts]: Start accepts. Automaton has 1390 states and 4729 transitions. Word has length 26 [2021-06-05 06:32:49,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:32:49,122 INFO L482 AbstractCegarLoop]: Abstraction has 1390 states and 4729 transitions. [2021-06-05 06:32:49,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:49,123 INFO L276 IsEmpty]: Start isEmpty. Operand 1390 states and 4729 transitions. [2021-06-05 06:32:49,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:32:49,124 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:32:49,124 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:32:49,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2215 [2021-06-05 06:32:49,325 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:32:49,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:32:49,325 INFO L82 PathProgramCache]: Analyzing trace with hash -945828357, now seen corresponding path program 26 times [2021-06-05 06:32:49,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:32:49,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408312558] [2021-06-05 06:32:49,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:32:49,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:32:49,518 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:32:49,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:32:49,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408312558] [2021-06-05 06:32:49,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408312558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:32:49,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144709434] [2021-06-05 06:32:49,519 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:32:49,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:32:49,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:32:49,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:32:49,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:32:49,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:32:49,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:32:49,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-06-05 06:32:49,686 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:32:49,692 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:49,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:32:49,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:32:49,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:32:49,696 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:32:49,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:49,707 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:49,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-05 06:32:49,708 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:32:49,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:49,717 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:32:49,717 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-05 06:32:49,732 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:32:49,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144709434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:32:49,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:32:49,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 06:32:49,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706281298] [2021-06-05 06:32:49,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:32:49,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:32:49,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:32:49,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:32:49,733 INFO L87 Difference]: Start difference. First operand 1390 states and 4729 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:50,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:32:50,340 INFO L93 Difference]: Finished difference Result 1896 states and 6197 transitions. [2021-06-05 06:32:50,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 06:32:50,340 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:32:50,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:32:50,343 INFO L225 Difference]: With dead ends: 1896 [2021-06-05 06:32:50,343 INFO L226 Difference]: Without dead ends: 1881 [2021-06-05 06:32:50,344 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 620.5ms TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:32:50,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1881 states. [2021-06-05 06:32:50,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1881 to 1401. [2021-06-05 06:32:50,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1401 states, 1400 states have (on average 3.405) internal successors, (4767), 1400 states have internal predecessors, (4767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:50,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1401 states to 1401 states and 4767 transitions. [2021-06-05 06:32:50,361 INFO L78 Accepts]: Start accepts. Automaton has 1401 states and 4767 transitions. Word has length 26 [2021-06-05 06:32:50,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:32:50,361 INFO L482 AbstractCegarLoop]: Abstraction has 1401 states and 4767 transitions. [2021-06-05 06:32:50,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:50,361 INFO L276 IsEmpty]: Start isEmpty. Operand 1401 states and 4767 transitions. [2021-06-05 06:32:50,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:32:50,363 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:32:50,363 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:32:50,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2216,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:32:50,563 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:32:50,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:32:50,564 INFO L82 PathProgramCache]: Analyzing trace with hash 604553207, now seen corresponding path program 44 times [2021-06-05 06:32:50,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:32:50,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787632652] [2021-06-05 06:32:50,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:32:50,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:32:50,796 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:32:50,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:32:50,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787632652] [2021-06-05 06:32:50,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787632652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:32:50,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076498803] [2021-06-05 06:32:50,797 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:32:50,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:32:50,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:32:50,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:32:50,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:32:50,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:32:50,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:32:50,990 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:50,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 63 [2021-06-05 06:32:51,068 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 06:32:51,086 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:51,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:32:51,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:32:51,101 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:51,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 53 [2021-06-05 06:32:51,172 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 06:32:51,201 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:51,235 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:51,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 83 [2021-06-05 06:32:51,461 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 06:32:52,361 WARN L205 SmtUtils]: Spent 899.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 119 [2021-06-05 06:32:52,362 INFO L628 ElimStorePlain]: treesize reduction 426, result has 80.4 percent of original size [2021-06-05 06:32:52,782 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:32:52,782 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:58, output treesize:149 [2021-06-05 06:32:52,840 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:32:52,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076498803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:32:52,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:32:52,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 06:32:52,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327166939] [2021-06-05 06:32:52,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:32:52,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:32:52,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:32:52,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:32:52,841 INFO L87 Difference]: Start difference. First operand 1401 states and 4767 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:54,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:32:54,744 INFO L93 Difference]: Finished difference Result 2295 states and 7289 transitions. [2021-06-05 06:32:54,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 06:32:54,744 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:32:54,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:32:54,748 INFO L225 Difference]: With dead ends: 2295 [2021-06-05 06:32:54,748 INFO L226 Difference]: Without dead ends: 2251 [2021-06-05 06:32:54,748 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1605.7ms TimeCoverageRelationStatistics Valid=492, Invalid=2370, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 06:32:54,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2251 states. [2021-06-05 06:32:54,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2251 to 1408. [2021-06-05 06:32:54,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1408 states, 1407 states have (on average 3.405828002842928) internal successors, (4792), 1407 states have internal predecessors, (4792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:54,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1408 states to 1408 states and 4792 transitions. [2021-06-05 06:32:54,769 INFO L78 Accepts]: Start accepts. Automaton has 1408 states and 4792 transitions. Word has length 26 [2021-06-05 06:32:54,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:32:54,769 INFO L482 AbstractCegarLoop]: Abstraction has 1408 states and 4792 transitions. [2021-06-05 06:32:54,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:54,769 INFO L276 IsEmpty]: Start isEmpty. Operand 1408 states and 4792 transitions. [2021-06-05 06:32:54,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:32:54,771 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:32:54,771 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:32:54,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2217 [2021-06-05 06:32:54,972 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:32:54,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:32:54,972 INFO L82 PathProgramCache]: Analyzing trace with hash -371765637, now seen corresponding path program 45 times [2021-06-05 06:32:54,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:32:54,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931569174] [2021-06-05 06:32:54,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:32:54,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:32:55,134 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:32:55,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:32:55,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931569174] [2021-06-05 06:32:55,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931569174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:32:55,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510283150] [2021-06-05 06:32:55,135 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:32:55,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:32:55,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:32:55,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:32:55,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:32:55,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:32:55,351 INFO L354 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2021-06-05 06:32:55,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 237 treesize of output 217 [2021-06-05 06:32:55,414 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 06:32:55,439 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:55,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:32:55,468 INFO L354 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2021-06-05 06:32:55,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 221 treesize of output 195 [2021-06-05 06:32:55,626 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 06:32:55,659 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:55,687 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:55,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 193 treesize of output 177 [2021-06-05 06:32:55,955 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:32:56,444 WARN L205 SmtUtils]: Spent 489.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 122 [2021-06-05 06:32:56,445 INFO L628 ElimStorePlain]: treesize reduction 242, result has 87.7 percent of original size [2021-06-05 06:32:56,815 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:32:56,816 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:245, output treesize:232 [2021-06-05 06:32:56,875 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:32:56,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510283150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:32:56,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:32:56,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-05 06:32:56,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254748255] [2021-06-05 06:32:56,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 06:32:56,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:32:56,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 06:32:56,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:32:56,876 INFO L87 Difference]: Start difference. First operand 1408 states and 4792 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:58,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:32:58,413 INFO L93 Difference]: Finished difference Result 2489 states and 8040 transitions. [2021-06-05 06:32:58,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 06:32:58,414 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:32:58,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:32:58,417 INFO L225 Difference]: With dead ends: 2489 [2021-06-05 06:32:58,417 INFO L226 Difference]: Without dead ends: 2474 [2021-06-05 06:32:58,418 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 1220.6ms TimeCoverageRelationStatistics Valid=347, Invalid=1909, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 06:32:58,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2474 states. [2021-06-05 06:32:58,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2474 to 1418. [2021-06-05 06:32:58,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1418 states, 1417 states have (on average 3.4064925899788285) internal successors, (4827), 1417 states have internal predecessors, (4827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:58,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1418 states to 1418 states and 4827 transitions. [2021-06-05 06:32:58,439 INFO L78 Accepts]: Start accepts. Automaton has 1418 states and 4827 transitions. Word has length 26 [2021-06-05 06:32:58,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:32:58,439 INFO L482 AbstractCegarLoop]: Abstraction has 1418 states and 4827 transitions. [2021-06-05 06:32:58,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:58,439 INFO L276 IsEmpty]: Start isEmpty. Operand 1418 states and 4827 transitions. [2021-06-05 06:32:58,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:32:58,441 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:32:58,441 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:32:58,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2350,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:32:58,649 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:32:58,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:32:58,649 INFO L82 PathProgramCache]: Analyzing trace with hash 644042019, now seen corresponding path program 27 times [2021-06-05 06:32:58,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:32:58,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138361113] [2021-06-05 06:32:58,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:32:58,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:32:58,818 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:32:58,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:32:58,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138361113] [2021-06-05 06:32:58,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138361113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:32:58,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548389133] [2021-06-05 06:32:58,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:32:58,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:32:58,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:32:58,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:32:58,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:32:58,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:32:58,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:32:58,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-06-05 06:32:58,990 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:32:58,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:58,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:32:58,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:32:58,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:32:59,001 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:32:59,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:59,013 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:59,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-05 06:32:59,014 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:32:59,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:59,023 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:32:59,023 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-05 06:32:59,038 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:32:59,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548389133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:32:59,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:32:59,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 06:32:59,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079120854] [2021-06-05 06:32:59,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:32:59,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:32:59,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:32:59,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:32:59,039 INFO L87 Difference]: Start difference. First operand 1418 states and 4827 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:59,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:32:59,882 INFO L93 Difference]: Finished difference Result 2009 states and 6538 transitions. [2021-06-05 06:32:59,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 06:32:59,882 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:32:59,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:32:59,885 INFO L225 Difference]: With dead ends: 2009 [2021-06-05 06:32:59,885 INFO L226 Difference]: Without dead ends: 1994 [2021-06-05 06:32:59,885 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 710.8ms TimeCoverageRelationStatistics Valid=227, Invalid=765, Unknown=0, NotChecked=0, Total=992 [2021-06-05 06:32:59,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1994 states. [2021-06-05 06:32:59,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1994 to 1423. [2021-06-05 06:32:59,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1423 states, 1422 states have (on average 3.407876230661041) internal successors, (4846), 1422 states have internal predecessors, (4846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:59,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1423 states to 1423 states and 4846 transitions. [2021-06-05 06:32:59,903 INFO L78 Accepts]: Start accepts. Automaton has 1423 states and 4846 transitions. Word has length 26 [2021-06-05 06:32:59,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:32:59,903 INFO L482 AbstractCegarLoop]: Abstraction has 1423 states and 4846 transitions. [2021-06-05 06:32:59,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:59,903 INFO L276 IsEmpty]: Start isEmpty. Operand 1423 states and 4846 transitions. [2021-06-05 06:32:59,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:32:59,905 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:32:59,905 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:33:00,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2498 [2021-06-05 06:33:00,105 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:33:00,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:33:00,105 INFO L82 PathProgramCache]: Analyzing trace with hash -973490761, now seen corresponding path program 28 times [2021-06-05 06:33:00,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:33:00,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173951404] [2021-06-05 06:33:00,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:33:00,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:33:00,241 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:33:00,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:33:00,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173951404] [2021-06-05 06:33:00,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173951404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:33:00,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702748414] [2021-06-05 06:33:00,241 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:33:00,264 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:33:00,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:33:00,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:33:00,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:33:00,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:33:00,375 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:33:00,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-06-05 06:33:00,396 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:33:00,408 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:33:00,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:33:00,415 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:33:00,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-05 06:33:00,430 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:33:00,443 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:33:00,459 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:33:00,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 06:33:00,469 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 06:33:00,514 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:33:00,527 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:33:00,527 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:54, output treesize:19 [2021-06-05 06:33:00,562 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:33:00,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702748414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:33:00,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:33:00,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 06:33:00,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872449857] [2021-06-05 06:33:00,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:33:00,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:33:00,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:33:00,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:33:00,563 INFO L87 Difference]: Start difference. First operand 1423 states and 4846 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:33:01,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:33:01,653 INFO L93 Difference]: Finished difference Result 2401 states and 7734 transitions. [2021-06-05 06:33:01,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 06:33:01,653 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:33:01,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:33:01,657 INFO L225 Difference]: With dead ends: 2401 [2021-06-05 06:33:01,657 INFO L226 Difference]: Without dead ends: 2382 [2021-06-05 06:33:01,657 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 781.5ms TimeCoverageRelationStatistics Valid=342, Invalid=1218, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 06:33:01,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2382 states. [2021-06-05 06:33:01,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2382 to 1416. [2021-06-05 06:33:01,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1416 states, 1415 states have (on average 3.4063604240282683) internal successors, (4820), 1415 states have internal predecessors, (4820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:33:01,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 4820 transitions. [2021-06-05 06:33:01,677 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 4820 transitions. Word has length 26 [2021-06-05 06:33:01,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:33:01,678 INFO L482 AbstractCegarLoop]: Abstraction has 1416 states and 4820 transitions. [2021-06-05 06:33:01,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:33:01,678 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 4820 transitions. [2021-06-05 06:33:01,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:33:01,679 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:33:01,679 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:33:01,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2499,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:33:01,880 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:33:01,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:33:01,880 INFO L82 PathProgramCache]: Analyzing trace with hash 830546731, now seen corresponding path program 46 times [2021-06-05 06:33:01,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:33:01,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071032494] [2021-06-05 06:33:01,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:33:01,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:33:02,042 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:33:02,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:33:02,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071032494] [2021-06-05 06:33:02,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071032494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:33:02,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811701305] [2021-06-05 06:33:02,043 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:33:02,065 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:33:02,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:33:02,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:33:02,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:33:02,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:33:02,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:33:02,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:33:02,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:33:02,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-06-05 06:33:02,186 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:33:02,193 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:33:02,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:33:02,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:33:02,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:33:02,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:33:02,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 06:33:02,198 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:33:02,204 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:33:02,209 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:33:02,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-05 06:33:02,211 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:33:02,218 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:33:02,219 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:33:02,220 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-05 06:33:02,236 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:33:02,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811701305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:33:02,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:33:02,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 06:33:02,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030799562] [2021-06-05 06:33:02,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:33:02,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:33:02,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:33:02,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:33:02,237 INFO L87 Difference]: Start difference. First operand 1416 states and 4820 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:33:03,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:33:03,655 INFO L93 Difference]: Finished difference Result 3014 states and 9632 transitions. [2021-06-05 06:33:03,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 06:33:03,656 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:33:03,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:33:03,660 INFO L225 Difference]: With dead ends: 3014 [2021-06-05 06:33:03,660 INFO L226 Difference]: Without dead ends: 2978 [2021-06-05 06:33:03,660 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 1132.6ms TimeCoverageRelationStatistics Valid=425, Invalid=1831, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 06:33:03,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2978 states. [2021-06-05 06:33:03,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2978 to 1549. [2021-06-05 06:33:03,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1549 states, 1548 states have (on average 3.4237726098191215) internal successors, (5300), 1548 states have internal predecessors, (5300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:33:03,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1549 states to 1549 states and 5300 transitions. [2021-06-05 06:33:03,686 INFO L78 Accepts]: Start accepts. Automaton has 1549 states and 5300 transitions. Word has length 26 [2021-06-05 06:33:03,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:33:03,686 INFO L482 AbstractCegarLoop]: Abstraction has 1549 states and 5300 transitions. [2021-06-05 06:33:03,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:33:03,686 INFO L276 IsEmpty]: Start isEmpty. Operand 1549 states and 5300 transitions. [2021-06-05 06:33:03,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:33:03,688 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:33:03,688 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:33:03,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2519,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:33:03,889 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:33:03,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:33:03,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1630771913, now seen corresponding path program 47 times [2021-06-05 06:33:03,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:33:03,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413178340] [2021-06-05 06:33:03,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:33:03,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:33:04,069 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:33:04,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:33:04,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413178340] [2021-06-05 06:33:04,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413178340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:33:04,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500126296] [2021-06-05 06:33:04,070 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:33:04,093 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:33:04,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:33:04,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:33:04,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:33:04,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:33:04,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:33:04,211 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:33:04,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 65 [2021-06-05 06:33:04,291 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 06:33:04,310 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:33:04,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:33:04,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:33:04,326 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:33:04,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 55 [2021-06-05 06:33:04,398 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 06:33:04,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:33:04,467 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:33:04,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 83 [2021-06-05 06:33:04,625 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 06:33:05,017 WARN L205 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 119 [2021-06-05 06:33:05,017 INFO L628 ElimStorePlain]: treesize reduction 248, result has 85.3 percent of original size [2021-06-05 06:33:05,204 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:33:05,204 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:56, output treesize:48 [2021-06-05 06:33:05,255 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:33:05,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500126296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:33:05,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:33:05,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 06:33:05,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007277714] [2021-06-05 06:33:05,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:33:05,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:33:05,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:33:05,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:33:05,256 INFO L87 Difference]: Start difference. First operand 1549 states and 5300 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:33:07,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:33:07,022 INFO L93 Difference]: Finished difference Result 3396 states and 10730 transitions. [2021-06-05 06:33:07,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 06:33:07,023 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:33:07,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:33:07,028 INFO L225 Difference]: With dead ends: 3396 [2021-06-05 06:33:07,028 INFO L226 Difference]: Without dead ends: 3339 [2021-06-05 06:33:07,028 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 1462.8ms TimeCoverageRelationStatistics Valid=512, Invalid=2038, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 06:33:07,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3339 states. [2021-06-05 06:33:07,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3339 to 1572. [2021-06-05 06:33:07,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1572 states, 1571 states have (on average 3.426479949077021) internal successors, (5383), 1571 states have internal predecessors, (5383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:33:07,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1572 states to 1572 states and 5383 transitions. [2021-06-05 06:33:07,058 INFO L78 Accepts]: Start accepts. Automaton has 1572 states and 5383 transitions. Word has length 26 [2021-06-05 06:33:07,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:33:07,058 INFO L482 AbstractCegarLoop]: Abstraction has 1572 states and 5383 transitions. [2021-06-05 06:33:07,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:33:07,058 INFO L276 IsEmpty]: Start isEmpty. Operand 1572 states and 5383 transitions. [2021-06-05 06:33:07,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:33:07,060 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:33:07,060 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:33:07,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2520 [2021-06-05 06:33:07,261 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:33:07,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:33:07,261 INFO L82 PathProgramCache]: Analyzing trace with hash 219730783, now seen corresponding path program 29 times [2021-06-05 06:33:07,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:33:07,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990159869] [2021-06-05 06:33:07,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:33:07,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:33:07,418 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:33:07,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:33:07,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990159869] [2021-06-05 06:33:07,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990159869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:33:07,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727832086] [2021-06-05 06:33:07,418 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:33:07,442 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:33:07,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:33:07,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:33:07,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:33:07,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:33:07,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:33:07,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-06-05 06:33:07,676 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:33:07,682 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:33:07,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:33:07,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:33:07,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:33:07,687 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:33:07,692 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:33:07,698 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:33:07,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-05 06:33:07,700 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:33:07,707 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:33:07,708 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:33:07,708 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-05 06:33:07,724 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:33:07,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727832086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:33:07,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:33:07,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 06:33:07,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873988206] [2021-06-05 06:33:07,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:33:07,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:33:07,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:33:07,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:33:07,725 INFO L87 Difference]: Start difference. First operand 1572 states and 5383 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:33:08,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:33:08,612 INFO L93 Difference]: Finished difference Result 1983 states and 6657 transitions. [2021-06-05 06:33:08,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 06:33:08,616 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:33:08,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:33:08,619 INFO L225 Difference]: With dead ends: 1983 [2021-06-05 06:33:08,619 INFO L226 Difference]: Without dead ends: 1968 [2021-06-05 06:33:08,620 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 644.2ms TimeCoverageRelationStatistics Valid=209, Invalid=847, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:33:08,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1968 states. [2021-06-05 06:33:08,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1968 to 1583. [2021-06-05 06:33:08,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1583 states, 1582 states have (on average 3.4260429835651074) internal successors, (5420), 1582 states have internal predecessors, (5420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:33:08,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1583 states to 1583 states and 5420 transitions. [2021-06-05 06:33:08,639 INFO L78 Accepts]: Start accepts. Automaton has 1583 states and 5420 transitions. Word has length 26 [2021-06-05 06:33:08,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:33:08,639 INFO L482 AbstractCegarLoop]: Abstraction has 1583 states and 5420 transitions. [2021-06-05 06:33:08,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:33:08,639 INFO L276 IsEmpty]: Start isEmpty. Operand 1583 states and 5420 transitions. [2021-06-05 06:33:08,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:33:08,641 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:33:08,641 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:33:08,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2633,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:33:08,842 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:33:08,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:33:08,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1397801997, now seen corresponding path program 30 times [2021-06-05 06:33:08,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:33:08,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604791681] [2021-06-05 06:33:08,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:33:08,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:33:08,977 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:33:08,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:33:08,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604791681] [2021-06-05 06:33:08,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604791681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:33:08,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901353306] [2021-06-05 06:33:08,978 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:33:09,010 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:33:09,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:33:09,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:33:09,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:33:09,133 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:33:09,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 51 [2021-06-05 06:33:09,175 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:33:09,191 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:33:09,203 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:33:09,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 43 [2021-06-05 06:33:09,235 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:33:09,258 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:33:09,277 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:33:09,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 06:33:09,303 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 06:33:09,355 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:33:09,421 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:33:09,421 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:59, output treesize:165 [2021-06-05 06:33:09,507 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:33:09,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901353306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:33:09,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:33:09,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 06:33:09,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484997628] [2021-06-05 06:33:09,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:33:09,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:33:09,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:33:09,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:33:09,508 INFO L87 Difference]: Start difference. First operand 1583 states and 5420 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:33:10,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:33:10,972 INFO L93 Difference]: Finished difference Result 2815 states and 9082 transitions. [2021-06-05 06:33:10,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 06:33:10,972 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:33:10,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:33:10,976 INFO L225 Difference]: With dead ends: 2815 [2021-06-05 06:33:10,976 INFO L226 Difference]: Without dead ends: 2777 [2021-06-05 06:33:10,976 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 1123.3ms TimeCoverageRelationStatistics Valid=351, Invalid=1629, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 06:33:10,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2777 states. [2021-06-05 06:33:10,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2777 to 1586. [2021-06-05 06:33:10,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1586 states, 1585 states have (on average 3.4227129337539433) internal successors, (5425), 1585 states have internal predecessors, (5425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:33:11,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1586 states to 1586 states and 5425 transitions. [2021-06-05 06:33:11,000 INFO L78 Accepts]: Start accepts. Automaton has 1586 states and 5425 transitions. Word has length 26 [2021-06-05 06:33:11,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:33:11,000 INFO L482 AbstractCegarLoop]: Abstraction has 1586 states and 5425 transitions. [2021-06-05 06:33:11,000 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:33:11,000 INFO L276 IsEmpty]: Start isEmpty. Operand 1586 states and 5425 transitions. [2021-06-05 06:33:11,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:33:11,002 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:33:11,002 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:33:11,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2634 [2021-06-05 06:33:11,202 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:33:11,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:33:11,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1207222395, now seen corresponding path program 31 times [2021-06-05 06:33:11,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:33:11,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678376706] [2021-06-05 06:33:11,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:33:11,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:33:11,336 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:33:11,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:33:11,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678376706] [2021-06-05 06:33:11,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678376706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:33:11,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464279764] [2021-06-05 06:33:11,337 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:33:11,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:33:11,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:33:11,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:33:11,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:33:11,478 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:33:11,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-06-05 06:33:11,493 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:33:11,504 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:33:11,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:33:11,510 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:33:11,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-05 06:33:11,526 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:33:11,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:33:11,557 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:33:11,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 06:33:11,567 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 06:33:11,611 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:33:11,624 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:33:11,624 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:54, output treesize:19 [2021-06-05 06:33:11,660 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:33:11,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464279764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:33:11,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:33:11,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 06:33:11,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592356885] [2021-06-05 06:33:11,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:33:11,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:33:11,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:33:11,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:33:11,661 INFO L87 Difference]: Start difference. First operand 1586 states and 5425 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:33:12,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:33:12,348 INFO L93 Difference]: Finished difference Result 2234 states and 7413 transitions. [2021-06-05 06:33:12,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 06:33:12,348 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:33:12,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:33:12,351 INFO L225 Difference]: With dead ends: 2234 [2021-06-05 06:33:12,351 INFO L226 Difference]: Without dead ends: 2209 [2021-06-05 06:33:12,351 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 581.9ms TimeCoverageRelationStatistics Valid=255, Invalid=1005, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 06:33:12,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2209 states. [2021-06-05 06:33:12,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2209 to 1580. [2021-06-05 06:33:12,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1580 states, 1579 states have (on average 3.4243191893603546) internal successors, (5407), 1579 states have internal predecessors, (5407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:33:12,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1580 states to 1580 states and 5407 transitions. [2021-06-05 06:33:12,370 INFO L78 Accepts]: Start accepts. Automaton has 1580 states and 5407 transitions. Word has length 26 [2021-06-05 06:33:12,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:33:12,371 INFO L482 AbstractCegarLoop]: Abstraction has 1580 states and 5407 transitions. [2021-06-05 06:33:12,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:33:12,371 INFO L276 IsEmpty]: Start isEmpty. Operand 1580 states and 5407 transitions. [2021-06-05 06:33:12,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:33:12,372 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:33:12,373 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:33:12,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2695 [2021-06-05 06:33:12,573 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:33:12,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:33:12,573 INFO L82 PathProgramCache]: Analyzing trace with hash -189976303, now seen corresponding path program 48 times [2021-06-05 06:33:12,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:33:12,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296983204] [2021-06-05 06:33:12,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:33:12,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:33:12,799 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:33:12,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:33:12,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296983204] [2021-06-05 06:33:12,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296983204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:33:12,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795305766] [2021-06-05 06:33:12,799 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:33:12,823 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:33:12,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:33:12,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:33:12,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:33:12,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:33:12,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:33:12,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:33:12,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-06-05 06:33:12,968 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:33:12,974 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:33:12,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:33:12,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:33:12,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:33:12,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 06:33:12,979 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:33:12,985 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:33:12,990 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:33:12,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-05 06:33:12,991 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:33:12,999 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:33:13,000 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:33:13,000 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-05 06:33:13,013 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:33:13,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795305766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:33:13,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:33:13,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 06:33:13,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85409109] [2021-06-05 06:33:13,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:33:13,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:33:13,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:33:13,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:33:13,013 INFO L87 Difference]: Start difference. First operand 1580 states and 5407 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:33:14,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:33:14,278 INFO L93 Difference]: Finished difference Result 2036 states and 6741 transitions. [2021-06-05 06:33:14,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 06:33:14,278 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:33:14,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:33:14,281 INFO L225 Difference]: With dead ends: 2036 [2021-06-05 06:33:14,282 INFO L226 Difference]: Without dead ends: 2014 [2021-06-05 06:33:14,282 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 1187.1ms TimeCoverageRelationStatistics Valid=344, Invalid=1462, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 06:33:14,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2014 states. [2021-06-05 06:33:14,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2014 to 1572. [2021-06-05 06:33:14,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1572 states, 1571 states have (on average 3.4239338001273074) internal successors, (5379), 1571 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:33:14,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1572 states to 1572 states and 5379 transitions. [2021-06-05 06:33:14,300 INFO L78 Accepts]: Start accepts. Automaton has 1572 states and 5379 transitions. Word has length 26 [2021-06-05 06:33:14,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:33:14,301 INFO L482 AbstractCegarLoop]: Abstraction has 1572 states and 5379 transitions. [2021-06-05 06:33:14,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:33:14,301 INFO L276 IsEmpty]: Start isEmpty. Operand 1572 states and 5379 transitions. [2021-06-05 06:33:14,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:33:14,303 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:33:14,303 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:33:14,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2714,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:33:14,506 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:33:14,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:33:14,506 INFO L82 PathProgramCache]: Analyzing trace with hash 735517563, now seen corresponding path program 49 times [2021-06-05 06:33:14,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:33:14,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610473700] [2021-06-05 06:33:14,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:33:14,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:33:14,747 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:33:14,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:33:14,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610473700] [2021-06-05 06:33:14,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610473700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:33:14,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723905560] [2021-06-05 06:33:14,748 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:33:14,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:33:14,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:33:14,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:33:16,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:33:16,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:33:16,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:33:16,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:33:16,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-06-05 06:33:16,629 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:33:16,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:33:16,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:33:16,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:33:16,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:33:16,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:33:16,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 06:33:16,641 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:33:16,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:33:16,652 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:33:16,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-05 06:33:16,653 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:33:16,660 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:33:16,661 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:33:16,662 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-05 06:33:16,678 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:33:16,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723905560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:33:16,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:33:16,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-05 06:33:16,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113105838] [2021-06-05 06:33:16,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:33:16,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:33:16,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:33:16,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=213, Unknown=2, NotChecked=0, Total=272 [2021-06-05 06:33:16,679 INFO L87 Difference]: Start difference. First operand 1572 states and 5379 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:34:03,384 WARN L205 SmtUtils]: Spent 780.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-06-05 06:34:06,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:34:06,178 INFO L93 Difference]: Finished difference Result 2238 states and 7416 transitions. [2021-06-05 06:34:06,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 06:34:06,178 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:34:06,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:34:06,182 INFO L225 Difference]: With dead ends: 2238 [2021-06-05 06:34:06,182 INFO L226 Difference]: Without dead ends: 2223 [2021-06-05 06:34:06,182 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 14183.5ms TimeCoverageRelationStatistics Valid=421, Invalid=1635, Unknown=14, NotChecked=0, Total=2070 [2021-06-05 06:34:06,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2223 states. [2021-06-05 06:34:06,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2223 to 1572. [2021-06-05 06:34:06,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1572 states, 1571 states have (on average 3.4239338001273074) internal successors, (5379), 1571 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:34:06,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1572 states to 1572 states and 5379 transitions. [2021-06-05 06:34:06,203 INFO L78 Accepts]: Start accepts. Automaton has 1572 states and 5379 transitions. Word has length 26 [2021-06-05 06:34:06,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:34:06,203 INFO L482 AbstractCegarLoop]: Abstraction has 1572 states and 5379 transitions. [2021-06-05 06:34:06,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:34:06,203 INFO L276 IsEmpty]: Start isEmpty. Operand 1572 states and 5379 transitions. [2021-06-05 06:34:06,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:34:06,205 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:34:06,205 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:34:06,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2715,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:34:06,409 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:34:06,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:34:06,409 INFO L82 PathProgramCache]: Analyzing trace with hash -442386977, now seen corresponding path program 50 times [2021-06-05 06:34:06,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:34:06,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471540647] [2021-06-05 06:34:06,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:34:06,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:34:06,606 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:34:06,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:34:06,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471540647] [2021-06-05 06:34:06,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471540647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:34:06,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110220684] [2021-06-05 06:34:06,606 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:34:06,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:34:06,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:34:06,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:34:06,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:34:06,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:34:06,820 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:34:06,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 73 [2021-06-05 06:34:06,975 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 06:34:06,998 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:34:07,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:34:07,027 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:34:07,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 63 [2021-06-05 06:34:07,184 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 06:34:07,222 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:34:07,259 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:34:07,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 83 [2021-06-05 06:34:07,489 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 06:34:07,999 WARN L205 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 126 [2021-06-05 06:34:07,999 INFO L628 ElimStorePlain]: treesize reduction 666, result has 70.8 percent of original size [2021-06-05 06:34:08,784 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:34:08,785 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:58, output treesize:20 [2021-06-05 06:34:08,847 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:34:08,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110220684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:34:08,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:34:08,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-05 06:34:08,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631071095] [2021-06-05 06:34:08,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 06:34:08,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:34:08,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 06:34:08,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:34:08,848 INFO L87 Difference]: Start difference. First operand 1572 states and 5379 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:34:11,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:34:11,918 INFO L93 Difference]: Finished difference Result 2935 states and 9380 transitions. [2021-06-05 06:34:11,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 06:34:11,919 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:34:11,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:34:11,923 INFO L225 Difference]: With dead ends: 2935 [2021-06-05 06:34:11,923 INFO L226 Difference]: Without dead ends: 2873 [2021-06-05 06:34:11,923 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1698 ImplicationChecksByTransitivity, 2563.1ms TimeCoverageRelationStatistics Valid=805, Invalid=4895, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 06:34:11,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2873 states. [2021-06-05 06:34:11,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2873 to 1625. [2021-06-05 06:34:11,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1625 states, 1624 states have (on average 3.4224137931034484) internal successors, (5558), 1624 states have internal predecessors, (5558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:34:11,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1625 states to 1625 states and 5558 transitions. [2021-06-05 06:34:11,947 INFO L78 Accepts]: Start accepts. Automaton has 1625 states and 5558 transitions. Word has length 26 [2021-06-05 06:34:11,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:34:11,948 INFO L482 AbstractCegarLoop]: Abstraction has 1625 states and 5558 transitions. [2021-06-05 06:34:11,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:34:11,948 INFO L276 IsEmpty]: Start isEmpty. Operand 1625 states and 5558 transitions. [2021-06-05 06:34:11,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:34:11,950 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:34:11,950 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:34:12,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2716,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:34:12,150 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:34:12,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:34:12,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1988624133, now seen corresponding path program 51 times [2021-06-05 06:34:12,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:34:12,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379067443] [2021-06-05 06:34:12,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:34:12,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:34:12,345 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:34:12,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:34:12,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379067443] [2021-06-05 06:34:12,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379067443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:34:12,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657345083] [2021-06-05 06:34:12,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:34:12,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:34:12,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:34:12,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 06:34:12,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:34:12,564 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:34:12,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 83 [2021-06-05 06:34:12,899 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 06:34:12,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:34:12,951 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:34:12,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 73 [2021-06-05 06:34:13,285 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 06:34:13,337 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:34:13,374 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:34:13,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 83 [2021-06-05 06:34:13,634 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 06:34:14,337 WARN L205 SmtUtils]: Spent 702.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 138 [2021-06-05 06:34:14,337 INFO L628 ElimStorePlain]: treesize reduction 678, result has 71.9 percent of original size [2021-06-05 06:34:15,165 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 278 [2021-06-05 06:34:15,661 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 216 [2021-06-05 06:34:16,754 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 189 [2021-06-05 06:34:16,935 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:34:16,935 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:64, output treesize:2790 [2021-06-05 06:34:17,569 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 44 [2021-06-05 06:34:17,694 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:34:17,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657345083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:34:17,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:34:17,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 06:34:17,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748960338] [2021-06-05 06:34:17,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:34:17,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:34:17,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:34:17,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:34:17,695 INFO L87 Difference]: Start difference. First operand 1625 states and 5558 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:34:20,039 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2021-06-05 06:34:20,486 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 47 [2021-06-05 06:34:21,011 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 52 [2021-06-05 06:34:21,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:34:21,071 INFO L93 Difference]: Finished difference Result 2782 states and 8999 transitions. [2021-06-05 06:34:21,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 06:34:21,072 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:34:21,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:34:21,076 INFO L225 Difference]: With dead ends: 2782 [2021-06-05 06:34:21,076 INFO L226 Difference]: Without dead ends: 2722 [2021-06-05 06:34:21,076 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 952 ImplicationChecksByTransitivity, 3149.3ms TimeCoverageRelationStatistics Valid=603, Invalid=2937, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 06:34:21,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2722 states. [2021-06-05 06:34:21,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2722 to 1634. [2021-06-05 06:34:21,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1634 states, 1633 states have (on average 3.425597060624617) internal successors, (5594), 1633 states have internal predecessors, (5594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:34:21,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1634 states to 1634 states and 5594 transitions. [2021-06-05 06:34:21,099 INFO L78 Accepts]: Start accepts. Automaton has 1634 states and 5594 transitions. Word has length 26 [2021-06-05 06:34:21,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:34:21,099 INFO L482 AbstractCegarLoop]: Abstraction has 1634 states and 5594 transitions. [2021-06-05 06:34:21,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:34:21,099 INFO L276 IsEmpty]: Start isEmpty. Operand 1634 states and 5594 transitions. [2021-06-05 06:34:21,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:34:21,101 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:34:21,101 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:34:21,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2974 [2021-06-05 06:34:21,307 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:34:21,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:34:21,307 INFO L82 PathProgramCache]: Analyzing trace with hash 521488947, now seen corresponding path program 52 times [2021-06-05 06:34:21,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:34:21,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291175176] [2021-06-05 06:34:21,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:34:21,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:34:21,529 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:34:21,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:34:21,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291175176] [2021-06-05 06:34:21,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291175176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:34:21,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790598556] [2021-06-05 06:34:21,529 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:34:21,553 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:34:21,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:34:21,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:34:21,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:34:25,640 WARN L205 SmtUtils]: Spent 762.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-06-05 06:34:25,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:34:25,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:34:25,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:34:25,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-06-05 06:34:25,661 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:34:25,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:34:25,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:34:25,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:34:25,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:34:25,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 06:34:25,671 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:34:25,677 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:34:25,683 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:34:25,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-05 06:34:25,684 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:34:25,692 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:34:25,693 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:34:25,693 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-05 06:34:25,708 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:34:25,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790598556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:34:25,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:34:25,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-05 06:34:25,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316537153] [2021-06-05 06:34:25,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:34:25,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:34:25,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:34:25,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=215, Unknown=3, NotChecked=0, Total=272 [2021-06-05 06:34:25,710 INFO L87 Difference]: Start difference. First operand 1634 states and 5594 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:34:28,462 WARN L205 SmtUtils]: Spent 1.59 s on a formula simplification that was a NOOP. DAG size: 35 [2021-06-05 06:34:28,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:34:28,550 INFO L93 Difference]: Finished difference Result 2185 states and 7232 transitions. [2021-06-05 06:34:28,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 06:34:28,550 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:34:28,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:34:28,553 INFO L225 Difference]: With dead ends: 2185 [2021-06-05 06:34:28,553 INFO L226 Difference]: Without dead ends: 2170 [2021-06-05 06:34:28,553 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 6687.8ms TimeCoverageRelationStatistics Valid=350, Invalid=1453, Unknown=3, NotChecked=0, Total=1806 [2021-06-05 06:34:28,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2170 states. [2021-06-05 06:34:28,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2170 to 1638. [2021-06-05 06:34:28,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1638 states, 1637 states have (on average 3.4257788637751987) internal successors, (5608), 1637 states have internal predecessors, (5608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:34:28,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1638 states to 1638 states and 5608 transitions. [2021-06-05 06:34:28,574 INFO L78 Accepts]: Start accepts. Automaton has 1638 states and 5608 transitions. Word has length 26 [2021-06-05 06:34:28,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:34:28,574 INFO L482 AbstractCegarLoop]: Abstraction has 1638 states and 5608 transitions. [2021-06-05 06:34:28,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:34:28,574 INFO L276 IsEmpty]: Start isEmpty. Operand 1638 states and 5608 transitions. [2021-06-05 06:34:28,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:34:28,576 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:34:28,576 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:34:28,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3488,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:34:28,777 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:34:28,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:34:28,777 INFO L82 PathProgramCache]: Analyzing trace with hash -2074580369, now seen corresponding path program 53 times [2021-06-05 06:34:28,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:34:28,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837463824] [2021-06-05 06:34:28,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:34:28,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:34:28,998 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:34:28,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:34:28,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837463824] [2021-06-05 06:34:28,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837463824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:34:28,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000439912] [2021-06-05 06:34:28,998 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:34:29,025 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 06:34:29,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:34:29,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:34:29,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:34:39,979 WARN L205 SmtUtils]: Spent 1.41 s on a formula simplification that was a NOOP. DAG size: 38 [2021-06-05 06:34:39,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:34:40,015 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-06-05 06:34:40,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 237 treesize of output 219 [2021-06-05 06:34:40,086 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 06:34:40,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:34:40,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:34:40,138 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-06-05 06:34:40,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 223 treesize of output 199 [2021-06-05 06:34:40,312 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 06:34:40,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:34:40,382 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:34:40,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 197 treesize of output 181 [2021-06-05 06:34:40,644 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:34:41,156 WARN L205 SmtUtils]: Spent 510.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 135 [2021-06-05 06:34:41,156 INFO L628 ElimStorePlain]: treesize reduction 162, result has 92.8 percent of original size [2021-06-05 06:34:42,071 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:34:42,071 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:245, output treesize:315 [2021-06-05 06:34:42,146 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:34:42,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000439912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:34:42,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:34:42,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-05 06:34:42,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999942110] [2021-06-05 06:34:42,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 06:34:42,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:34:42,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 06:34:42,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=349, Unknown=6, NotChecked=0, Total=420 [2021-06-05 06:34:42,147 INFO L87 Difference]: Start difference. First operand 1638 states and 5608 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:35:47,565 WARN L205 SmtUtils]: Spent 4.99 s on a formula simplification. DAG size of input: 76 DAG size of output: 72 [2021-06-05 06:35:59,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:35:59,770 INFO L93 Difference]: Finished difference Result 2374 states and 7924 transitions. [2021-06-05 06:35:59,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 06:35:59,770 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:35:59,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:35:59,774 INFO L225 Difference]: With dead ends: 2374 [2021-06-05 06:35:59,774 INFO L226 Difference]: Without dead ends: 2359 [2021-06-05 06:35:59,774 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 21018.8ms TimeCoverageRelationStatistics Valid=305, Invalid=1579, Unknown=8, NotChecked=0, Total=1892 [2021-06-05 06:35:59,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2359 states. [2021-06-05 06:35:59,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2359 to 1638. [2021-06-05 06:35:59,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1638 states, 1637 states have (on average 3.4257788637751987) internal successors, (5608), 1637 states have internal predecessors, (5608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:35:59,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1638 states to 1638 states and 5608 transitions. [2021-06-05 06:35:59,796 INFO L78 Accepts]: Start accepts. Automaton has 1638 states and 5608 transitions. Word has length 26 [2021-06-05 06:35:59,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:35:59,796 INFO L482 AbstractCegarLoop]: Abstraction has 1638 states and 5608 transitions. [2021-06-05 06:35:59,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:35:59,796 INFO L276 IsEmpty]: Start isEmpty. Operand 1638 states and 5608 transitions. [2021-06-05 06:35:59,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:35:59,798 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:35:59,798 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:35:59,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3489 [2021-06-05 06:35:59,998 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:35:59,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:35:59,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1346907209, now seen corresponding path program 54 times [2021-06-05 06:35:59,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:35:59,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648617773] [2021-06-05 06:35:59,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:36:00,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:36:00,156 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:36:00,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:36:00,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648617773] [2021-06-05 06:36:00,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648617773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:36:00,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135794522] [2021-06-05 06:36:00,157 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:36:00,187 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:36:00,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:36:00,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:36:00,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:36:00,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:36:00,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:36:00,310 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:00,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 63 [2021-06-05 06:36:00,384 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 06:36:00,402 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:00,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:36:00,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:36:00,418 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:00,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 53 [2021-06-05 06:36:00,497 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 06:36:00,525 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:00,563 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:00,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 83 [2021-06-05 06:36:00,801 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 06:36:01,419 WARN L205 SmtUtils]: Spent 617.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 107 [2021-06-05 06:36:01,419 INFO L628 ElimStorePlain]: treesize reduction 1132, result has 46.5 percent of original size [2021-06-05 06:36:01,644 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:36:01,644 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:53, output treesize:15 [2021-06-05 06:36:01,678 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:36:01,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135794522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:36:01,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:36:01,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 18 [2021-06-05 06:36:01,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044394717] [2021-06-05 06:36:01,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:36:01,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:36:01,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:36:01,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:36:01,679 INFO L87 Difference]: Start difference. First operand 1638 states and 5608 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:36:03,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:36:03,459 INFO L93 Difference]: Finished difference Result 3261 states and 10301 transitions. [2021-06-05 06:36:03,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 06:36:03,459 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:36:03,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:36:03,464 INFO L225 Difference]: With dead ends: 3261 [2021-06-05 06:36:03,464 INFO L226 Difference]: Without dead ends: 3214 [2021-06-05 06:36:03,464 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1125 ImplicationChecksByTransitivity, 1367.7ms TimeCoverageRelationStatistics Valid=656, Invalid=3126, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 06:36:03,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3214 states. [2021-06-05 06:36:03,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3214 to 1647. [2021-06-05 06:36:03,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1647 states, 1646 states have (on average 3.4264884568651275) internal successors, (5640), 1646 states have internal predecessors, (5640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:36:03,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1647 states to 1647 states and 5640 transitions. [2021-06-05 06:36:03,493 INFO L78 Accepts]: Start accepts. Automaton has 1647 states and 5640 transitions. Word has length 26 [2021-06-05 06:36:03,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:36:03,493 INFO L482 AbstractCegarLoop]: Abstraction has 1647 states and 5640 transitions. [2021-06-05 06:36:03,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:36:03,493 INFO L276 IsEmpty]: Start isEmpty. Operand 1647 states and 5640 transitions. [2021-06-05 06:36:03,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:36:03,495 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:36:03,495 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:36:03,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3813,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:36:03,709 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:36:03,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:36:03,709 INFO L82 PathProgramCache]: Analyzing trace with hash -916217703, now seen corresponding path program 55 times [2021-06-05 06:36:03,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:36:03,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397826463] [2021-06-05 06:36:03,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:36:03,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:36:03,926 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:36:03,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:36:03,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397826463] [2021-06-05 06:36:03,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397826463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:36:03,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293290822] [2021-06-05 06:36:03,926 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:36:03,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:36:03,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:36:03,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:36:04,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:36:04,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:36:04,065 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:04,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 63 [2021-06-05 06:36:04,137 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 06:36:04,155 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:04,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:36:04,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:36:04,170 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:04,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 53 [2021-06-05 06:36:04,245 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 06:36:04,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:04,311 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:04,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 83 [2021-06-05 06:36:04,582 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 06:36:05,007 WARN L205 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 108 [2021-06-05 06:36:05,007 INFO L628 ElimStorePlain]: treesize reduction 1472, result has 39.4 percent of original size [2021-06-05 06:36:05,164 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:36:05,164 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:53, output treesize:15 [2021-06-05 06:36:05,201 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:36:05,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293290822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:36:05,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:36:05,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 06:36:05,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914453236] [2021-06-05 06:36:05,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:36:05,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:36:05,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:36:05,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:36:05,203 INFO L87 Difference]: Start difference. First operand 1647 states and 5640 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:36:07,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:36:07,502 INFO L93 Difference]: Finished difference Result 2920 states and 9365 transitions. [2021-06-05 06:36:07,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 06:36:07,503 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:36:07,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:36:07,507 INFO L225 Difference]: With dead ends: 2920 [2021-06-05 06:36:07,507 INFO L226 Difference]: Without dead ends: 2886 [2021-06-05 06:36:07,507 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 2074.8ms TimeCoverageRelationStatistics Valid=698, Invalid=2494, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 06:36:07,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2886 states. [2021-06-05 06:36:07,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2886 to 1654. [2021-06-05 06:36:07,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1654 states, 1653 states have (on average 3.434966727162734) internal successors, (5678), 1653 states have internal predecessors, (5678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:36:07,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1654 states to 1654 states and 5678 transitions. [2021-06-05 06:36:07,531 INFO L78 Accepts]: Start accepts. Automaton has 1654 states and 5678 transitions. Word has length 26 [2021-06-05 06:36:07,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:36:07,531 INFO L482 AbstractCegarLoop]: Abstraction has 1654 states and 5678 transitions. [2021-06-05 06:36:07,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:36:07,532 INFO L276 IsEmpty]: Start isEmpty. Operand 1654 states and 5678 transitions. [2021-06-05 06:36:07,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:36:07,534 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:36:07,534 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:36:07,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3947 [2021-06-05 06:36:07,734 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:36:07,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:36:07,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1471656619, now seen corresponding path program 32 times [2021-06-05 06:36:07,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:36:07,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395265806] [2021-06-05 06:36:07,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:36:07,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:36:07,835 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:36:07,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:36:07,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395265806] [2021-06-05 06:36:07,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395265806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:36:07,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608891977] [2021-06-05 06:36:07,836 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:36:07,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:36:07,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:36:07,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:36:07,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:36:07,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:36:07,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:36:08,003 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:08,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2021-06-05 06:36:08,019 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:36:08,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:08,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:36:08,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:36:08,038 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:08,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-06-05 06:36:08,053 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:36:08,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:08,086 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:08,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 06:36:08,095 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 06:36:08,143 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:08,156 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:36:08,157 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:56, output treesize:41 [2021-06-05 06:36:08,199 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:36:08,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608891977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:36:08,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:36:08,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 06:36:08,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869885835] [2021-06-05 06:36:08,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:36:08,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:36:08,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:36:08,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:36:08,200 INFO L87 Difference]: Start difference. First operand 1654 states and 5678 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:36:09,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:36:09,101 INFO L93 Difference]: Finished difference Result 2114 states and 7070 transitions. [2021-06-05 06:36:09,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 06:36:09,102 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:36:09,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:36:09,104 INFO L225 Difference]: With dead ends: 2114 [2021-06-05 06:36:09,104 INFO L226 Difference]: Without dead ends: 2099 [2021-06-05 06:36:09,105 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 653.2ms TimeCoverageRelationStatistics Valid=168, Invalid=888, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:36:09,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2099 states. [2021-06-05 06:36:09,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2099 to 1645. [2021-06-05 06:36:09,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1645 states, 1644 states have (on average 3.431873479318735) internal successors, (5642), 1644 states have internal predecessors, (5642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:36:09,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1645 states to 1645 states and 5642 transitions. [2021-06-05 06:36:09,124 INFO L78 Accepts]: Start accepts. Automaton has 1645 states and 5642 transitions. Word has length 26 [2021-06-05 06:36:09,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:36:09,124 INFO L482 AbstractCegarLoop]: Abstraction has 1645 states and 5642 transitions. [2021-06-05 06:36:09,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:36:09,124 INFO L276 IsEmpty]: Start isEmpty. Operand 1645 states and 5642 transitions. [2021-06-05 06:36:09,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:36:09,126 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:36:09,126 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:36:09,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4081 [2021-06-05 06:36:09,329 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:36:09,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:36:09,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1471507747, now seen corresponding path program 33 times [2021-06-05 06:36:09,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:36:09,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048688967] [2021-06-05 06:36:09,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:36:09,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:36:09,453 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:36:09,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:36:09,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048688967] [2021-06-05 06:36:09,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048688967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:36:09,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013983335] [2021-06-05 06:36:09,453 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:36:09,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:36:09,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:36:09,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:36:09,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:36:09,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:36:09,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:36:09,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-06-05 06:36:09,665 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:36:09,671 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:09,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:36:09,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:36:09,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:36:09,675 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:36:09,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:09,686 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:09,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-05 06:36:09,687 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:36:09,695 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:09,696 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:36:09,696 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-05 06:36:09,712 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:36:09,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013983335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:36:09,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:36:09,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 06:36:09,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102254950] [2021-06-05 06:36:09,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:36:09,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:36:09,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:36:09,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:36:09,713 INFO L87 Difference]: Start difference. First operand 1645 states and 5642 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:36:10,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:36:10,404 INFO L93 Difference]: Finished difference Result 2294 states and 7660 transitions. [2021-06-05 06:36:10,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 06:36:10,404 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:36:10,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:36:10,407 INFO L225 Difference]: With dead ends: 2294 [2021-06-05 06:36:10,407 INFO L226 Difference]: Without dead ends: 2279 [2021-06-05 06:36:10,407 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 530.2ms TimeCoverageRelationStatistics Valid=187, Invalid=805, Unknown=0, NotChecked=0, Total=992 [2021-06-05 06:36:10,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2279 states. [2021-06-05 06:36:10,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2279 to 1647. [2021-06-05 06:36:10,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1647 states, 1646 states have (on average 3.431956257594168) internal successors, (5649), 1646 states have internal predecessors, (5649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:36:10,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1647 states to 1647 states and 5649 transitions. [2021-06-05 06:36:10,427 INFO L78 Accepts]: Start accepts. Automaton has 1647 states and 5649 transitions. Word has length 26 [2021-06-05 06:36:10,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:36:10,427 INFO L482 AbstractCegarLoop]: Abstraction has 1647 states and 5649 transitions. [2021-06-05 06:36:10,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:36:10,427 INFO L276 IsEmpty]: Start isEmpty. Operand 1647 states and 5649 transitions. [2021-06-05 06:36:10,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:36:10,429 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:36:10,429 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:36:10,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4099,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:36:10,629 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:36:10,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:36:10,630 INFO L82 PathProgramCache]: Analyzing trace with hash -146025033, now seen corresponding path program 34 times [2021-06-05 06:36:10,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:36:10,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069050346] [2021-06-05 06:36:10,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:36:10,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:36:10,740 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:36:10,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:36:10,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069050346] [2021-06-05 06:36:10,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069050346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:36:10,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160415692] [2021-06-05 06:36:10,740 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:36:10,763 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:36:10,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:36:10,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:36:10,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:36:10,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:36:10,911 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:10,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-06-05 06:36:10,926 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:36:10,938 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:10,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:36:10,944 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:10,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-05 06:36:10,960 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:36:10,974 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:10,991 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:10,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 06:36:10,996 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 06:36:11,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:11,052 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:36:11,052 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:54, output treesize:19 [2021-06-05 06:36:11,089 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:36:11,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160415692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:36:11,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:36:11,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 06:36:11,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803824074] [2021-06-05 06:36:11,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:36:11,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:36:11,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:36:11,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:36:11,090 INFO L87 Difference]: Start difference. First operand 1647 states and 5649 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:36:11,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:36:11,805 INFO L93 Difference]: Finished difference Result 2530 states and 8380 transitions. [2021-06-05 06:36:11,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 06:36:11,805 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:36:11,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:36:11,809 INFO L225 Difference]: With dead ends: 2530 [2021-06-05 06:36:11,809 INFO L226 Difference]: Without dead ends: 2515 [2021-06-05 06:36:11,809 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 622.1ms TimeCoverageRelationStatistics Valid=248, Invalid=942, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:36:11,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2515 states. [2021-06-05 06:36:11,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2515 to 1638. [2021-06-05 06:36:11,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1638 states, 1637 states have (on average 3.427000610873549) internal successors, (5610), 1637 states have internal predecessors, (5610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:36:11,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1638 states to 1638 states and 5610 transitions. [2021-06-05 06:36:11,831 INFO L78 Accepts]: Start accepts. Automaton has 1638 states and 5610 transitions. Word has length 26 [2021-06-05 06:36:11,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:36:11,831 INFO L482 AbstractCegarLoop]: Abstraction has 1638 states and 5610 transitions. [2021-06-05 06:36:11,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:36:11,831 INFO L276 IsEmpty]: Start isEmpty. Operand 1638 states and 5610 transitions. [2021-06-05 06:36:11,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:36:11,833 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:36:11,833 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:36:12,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4100,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:36:12,033 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:36:12,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:36:12,033 INFO L82 PathProgramCache]: Analyzing trace with hash -628905925, now seen corresponding path program 35 times [2021-06-05 06:36:12,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:36:12,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637557992] [2021-06-05 06:36:12,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:36:12,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:36:12,160 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:36:12,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:36:12,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637557992] [2021-06-05 06:36:12,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637557992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:36:12,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436181631] [2021-06-05 06:36:12,160 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:36:12,184 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:36:12,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:36:12,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:36:12,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:36:12,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:36:12,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:36:12,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-06-05 06:36:12,337 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:36:12,343 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:12,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:36:12,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:36:12,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:36:12,348 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:36:12,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:12,359 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:12,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-05 06:36:12,361 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:36:12,368 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:12,370 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:36:12,370 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-05 06:36:12,383 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:36:12,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436181631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:36:12,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:36:12,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 06:36:12,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590015782] [2021-06-05 06:36:12,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:36:12,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:36:12,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:36:12,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:36:12,383 INFO L87 Difference]: Start difference. First operand 1638 states and 5610 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:36:12,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:36:12,700 INFO L93 Difference]: Finished difference Result 2064 states and 6895 transitions. [2021-06-05 06:36:12,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:36:12,700 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:36:12,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:36:12,703 INFO L225 Difference]: With dead ends: 2064 [2021-06-05 06:36:12,704 INFO L226 Difference]: Without dead ends: 2043 [2021-06-05 06:36:12,704 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 349.4ms TimeCoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:36:12,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2043 states. [2021-06-05 06:36:12,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2043 to 1638. [2021-06-05 06:36:12,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1638 states, 1637 states have (on average 3.427000610873549) internal successors, (5610), 1637 states have internal predecessors, (5610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:36:12,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1638 states to 1638 states and 5610 transitions. [2021-06-05 06:36:12,725 INFO L78 Accepts]: Start accepts. Automaton has 1638 states and 5610 transitions. Word has length 26 [2021-06-05 06:36:12,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:36:12,726 INFO L482 AbstractCegarLoop]: Abstraction has 1638 states and 5610 transitions. [2021-06-05 06:36:12,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:36:12,726 INFO L276 IsEmpty]: Start isEmpty. Operand 1638 states and 5610 transitions. [2021-06-05 06:36:12,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:36:12,728 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:36:12,728 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:36:12,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4119,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:36:12,941 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:36:12,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:36:12,941 INFO L82 PathProgramCache]: Analyzing trace with hash -2009149475, now seen corresponding path program 36 times [2021-06-05 06:36:12,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:36:12,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147915208] [2021-06-05 06:36:12,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:36:12,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:36:13,063 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:36:13,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:36:13,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147915208] [2021-06-05 06:36:13,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147915208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:36:13,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629490849] [2021-06-05 06:36:13,063 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 06:36:13,095 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:36:13,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:36:13,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:36:13,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:36:13,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:36:13,276 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:13,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 51 [2021-06-05 06:36:13,311 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:36:13,328 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:13,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:36:13,340 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:13,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 43 [2021-06-05 06:36:13,372 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:36:13,397 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:13,417 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:13,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 06:36:13,421 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 06:36:13,478 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:13,516 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:36:13,516 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:57, output treesize:173 [2021-06-05 06:36:13,626 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:36:13,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629490849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:36:13,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:36:13,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 06:36:13,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037218190] [2021-06-05 06:36:13,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:36:13,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:36:13,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:36:13,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:36:13,627 INFO L87 Difference]: Start difference. First operand 1638 states and 5610 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:36:16,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:36:16,385 INFO L93 Difference]: Finished difference Result 2222 states and 7252 transitions. [2021-06-05 06:36:16,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 06:36:16,385 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:36:16,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:36:16,388 INFO L225 Difference]: With dead ends: 2222 [2021-06-05 06:36:16,388 INFO L226 Difference]: Without dead ends: 2184 [2021-06-05 06:36:16,389 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 888.9ms TimeCoverageRelationStatistics Valid=176, Invalid=1156, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 06:36:16,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2184 states. [2021-06-05 06:36:16,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2184 to 1632. [2021-06-05 06:36:16,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1632 states, 1631 states have (on average 3.4267320662170446) internal successors, (5589), 1631 states have internal predecessors, (5589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:36:16,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1632 states to 1632 states and 5589 transitions. [2021-06-05 06:36:16,409 INFO L78 Accepts]: Start accepts. Automaton has 1632 states and 5589 transitions. Word has length 26 [2021-06-05 06:36:16,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:36:16,409 INFO L482 AbstractCegarLoop]: Abstraction has 1632 states and 5589 transitions. [2021-06-05 06:36:16,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:36:16,409 INFO L276 IsEmpty]: Start isEmpty. Operand 1632 states and 5589 transitions. [2021-06-05 06:36:16,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:36:16,411 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:36:16,411 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:36:16,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4120 [2021-06-05 06:36:16,611 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:36:16,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:36:16,611 INFO L82 PathProgramCache]: Analyzing trace with hash -816683043, now seen corresponding path program 37 times [2021-06-05 06:36:16,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:36:16,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980634770] [2021-06-05 06:36:16,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:36:16,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:36:16,731 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:36:16,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:36:16,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980634770] [2021-06-05 06:36:16,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980634770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:36:16,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416705826] [2021-06-05 06:36:16,731 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:36:16,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:36:16,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:36:16,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:36:16,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:36:16,871 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:16,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-06-05 06:36:16,885 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:36:16,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:16,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:36:16,900 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:16,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-05 06:36:16,915 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:36:16,927 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:16,943 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:16,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 06:36:16,953 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 06:36:16,998 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:17,008 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:36:17,008 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:49, output treesize:15 [2021-06-05 06:36:17,042 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:36:17,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416705826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:36:17,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:36:17,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 06:36:17,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979815829] [2021-06-05 06:36:17,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:36:17,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:36:17,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:36:17,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:36:17,042 INFO L87 Difference]: Start difference. First operand 1632 states and 5589 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:36:17,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:36:17,320 INFO L93 Difference]: Finished difference Result 2129 states and 7065 transitions. [2021-06-05 06:36:17,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 06:36:17,321 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:36:17,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:36:17,323 INFO L225 Difference]: With dead ends: 2129 [2021-06-05 06:36:17,323 INFO L226 Difference]: Without dead ends: 2104 [2021-06-05 06:36:17,324 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 287.5ms TimeCoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:36:17,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2021-06-05 06:36:17,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 1626. [2021-06-05 06:36:17,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1626 states, 1625 states have (on average 3.420923076923077) internal successors, (5559), 1625 states have internal predecessors, (5559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:36:17,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1626 states to 1626 states and 5559 transitions. [2021-06-05 06:36:17,343 INFO L78 Accepts]: Start accepts. Automaton has 1626 states and 5559 transitions. Word has length 26 [2021-06-05 06:36:17,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:36:17,343 INFO L482 AbstractCegarLoop]: Abstraction has 1626 states and 5559 transitions. [2021-06-05 06:36:17,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:36:17,343 INFO L276 IsEmpty]: Start isEmpty. Operand 1626 states and 5559 transitions. [2021-06-05 06:36:17,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:36:17,345 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:36:17,345 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:36:17,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4170,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:36:17,545 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:36:17,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:36:17,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1649350967, now seen corresponding path program 38 times [2021-06-05 06:36:17,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:36:17,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308833705] [2021-06-05 06:36:17,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:36:17,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:36:17,672 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:36:17,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:36:17,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308833705] [2021-06-05 06:36:17,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308833705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:36:17,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59250922] [2021-06-05 06:36:17,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:36:17,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:36:17,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:36:17,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:36:17,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:36:17,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:36:17,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:36:17,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-06-05 06:36:17,829 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:36:17,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:17,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:36:17,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:36:17,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:36:17,839 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:36:17,845 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:17,851 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:17,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-05 06:36:17,852 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:36:17,860 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:17,861 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:36:17,862 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-05 06:36:17,878 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:36:17,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59250922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:36:17,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:36:17,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 06:36:17,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70917205] [2021-06-05 06:36:17,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:36:17,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:36:17,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:36:17,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:36:17,878 INFO L87 Difference]: Start difference. First operand 1626 states and 5559 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:36:18,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:36:18,094 INFO L93 Difference]: Finished difference Result 1701 states and 5724 transitions. [2021-06-05 06:36:18,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 06:36:18,095 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:36:18,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:36:18,097 INFO L225 Difference]: With dead ends: 1701 [2021-06-05 06:36:18,097 INFO L226 Difference]: Without dead ends: 1682 [2021-06-05 06:36:18,097 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 240.1ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:36:18,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1682 states. [2021-06-05 06:36:18,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1682 to 1618. [2021-06-05 06:36:18,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1618 states, 1617 states have (on average 3.419294990723562) internal successors, (5529), 1617 states have internal predecessors, (5529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:36:18,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1618 states to 1618 states and 5529 transitions. [2021-06-05 06:36:18,114 INFO L78 Accepts]: Start accepts. Automaton has 1618 states and 5529 transitions. Word has length 26 [2021-06-05 06:36:18,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:36:18,114 INFO L482 AbstractCegarLoop]: Abstraction has 1618 states and 5529 transitions. [2021-06-05 06:36:18,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:36:18,114 INFO L276 IsEmpty]: Start isEmpty. Operand 1618 states and 5529 transitions. [2021-06-05 06:36:18,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:36:18,116 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:36:18,116 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:36:18,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4188 [2021-06-05 06:36:18,316 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:36:18,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:36:18,317 INFO L82 PathProgramCache]: Analyzing trace with hash -497941569, now seen corresponding path program 39 times [2021-06-05 06:36:18,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:36:18,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111403442] [2021-06-05 06:36:18,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:36:18,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:36:18,445 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:36:18,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:36:18,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111403442] [2021-06-05 06:36:18,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111403442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:36:18,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943841782] [2021-06-05 06:36:18,446 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:36:18,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:36:18,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:36:18,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:36:18,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:36:20,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:36:20,227 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:20,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 51 [2021-06-05 06:36:20,275 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:36:20,292 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:20,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:36:20,303 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:20,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 43 [2021-06-05 06:36:20,342 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:36:20,368 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:20,389 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:20,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 06:36:20,393 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 06:36:20,447 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:20,488 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:36:20,488 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:57, output treesize:154 [2021-06-05 06:36:20,585 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:36:20,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943841782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:36:20,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:36:20,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 06:36:20,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057983350] [2021-06-05 06:36:20,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:36:20,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:36:20,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:36:20,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=251, Unknown=1, NotChecked=0, Total=306 [2021-06-05 06:36:20,586 INFO L87 Difference]: Start difference. First operand 1618 states and 5529 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:36:33,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:36:33,720 INFO L93 Difference]: Finished difference Result 1845 states and 6184 transitions. [2021-06-05 06:36:33,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 06:36:33,720 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:36:33,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:36:33,722 INFO L225 Difference]: With dead ends: 1845 [2021-06-05 06:36:33,722 INFO L226 Difference]: Without dead ends: 1820 [2021-06-05 06:36:33,723 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 5671.0ms TimeCoverageRelationStatistics Valid=129, Invalid=624, Unknown=3, NotChecked=0, Total=756 [2021-06-05 06:36:33,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1820 states. [2021-06-05 06:36:33,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1820 to 1600. [2021-06-05 06:36:33,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1600 states, 1599 states have (on average 3.424015009380863) internal successors, (5475), 1599 states have internal predecessors, (5475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:36:33,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 5475 transitions. [2021-06-05 06:36:33,741 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 5475 transitions. Word has length 26 [2021-06-05 06:36:33,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:36:33,741 INFO L482 AbstractCegarLoop]: Abstraction has 1600 states and 5475 transitions. [2021-06-05 06:36:33,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:36:33,741 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 5475 transitions. [2021-06-05 06:36:33,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:36:33,743 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:36:33,743 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:36:33,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4189 [2021-06-05 06:36:33,944 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:36:33,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:36:33,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1031976481, now seen corresponding path program 40 times [2021-06-05 06:36:33,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:36:33,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376920050] [2021-06-05 06:36:33,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:36:33,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:36:34,050 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:36:34,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:36:34,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376920050] [2021-06-05 06:36:34,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376920050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:36:34,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261666297] [2021-06-05 06:36:34,050 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:36:34,073 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:36:34,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:36:34,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:36:34,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:36:34,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:36:34,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:36:34,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-06-05 06:36:34,240 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:36:34,246 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:34,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:36:34,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:36:34,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:36:34,250 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:36:34,256 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:34,261 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:34,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-05 06:36:34,262 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:36:34,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:34,271 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:36:34,271 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-05 06:36:34,286 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:36:34,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261666297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:36:34,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:36:34,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 06:36:34,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244409452] [2021-06-05 06:36:34,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:36:34,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:36:34,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:36:34,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:36:34,287 INFO L87 Difference]: Start difference. First operand 1600 states and 5475 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:36:34,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:36:34,718 INFO L93 Difference]: Finished difference Result 2102 states and 6991 transitions. [2021-06-05 06:36:34,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 06:36:34,718 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:36:34,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:36:34,722 INFO L225 Difference]: With dead ends: 2102 [2021-06-05 06:36:34,722 INFO L226 Difference]: Without dead ends: 2087 [2021-06-05 06:36:34,722 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 407.6ms TimeCoverageRelationStatistics Valid=174, Invalid=696, Unknown=0, NotChecked=0, Total=870 [2021-06-05 06:36:34,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2087 states. [2021-06-05 06:36:34,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2087 to 1595. [2021-06-05 06:36:34,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1595 states, 1594 states have (on average 3.422835633626098) internal successors, (5456), 1594 states have internal predecessors, (5456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:36:34,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1595 states to 1595 states and 5456 transitions. [2021-06-05 06:36:34,741 INFO L78 Accepts]: Start accepts. Automaton has 1595 states and 5456 transitions. Word has length 26 [2021-06-05 06:36:34,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:36:34,741 INFO L482 AbstractCegarLoop]: Abstraction has 1595 states and 5456 transitions. [2021-06-05 06:36:34,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:36:34,742 INFO L276 IsEmpty]: Start isEmpty. Operand 1595 states and 5456 transitions. [2021-06-05 06:36:34,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:36:34,744 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:36:34,744 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:36:34,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4243 [2021-06-05 06:36:34,959 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:36:34,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:36:34,959 INFO L82 PathProgramCache]: Analyzing trace with hash -44484869, now seen corresponding path program 41 times [2021-06-05 06:36:34,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:36:34,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335917875] [2021-06-05 06:36:34,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:36:34,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:36:35,066 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:36:35,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:36:35,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335917875] [2021-06-05 06:36:35,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335917875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:36:35,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930363268] [2021-06-05 06:36:35,066 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:36:35,090 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:36:35,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:36:35,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:36:35,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:36:38,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:36:38,345 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:38,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-06-05 06:36:38,362 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:36:38,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:38,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:36:38,381 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:38,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-05 06:36:38,396 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:36:38,412 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:38,429 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:38,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 06:36:38,433 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 06:36:38,475 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:38,487 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:36:38,487 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:52, output treesize:40 [2021-06-05 06:36:38,525 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:36:38,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930363268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:36:38,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:36:38,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 06:36:38,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275747892] [2021-06-05 06:36:38,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:36:38,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:36:38,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:36:38,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=272, Unknown=2, NotChecked=0, Total=342 [2021-06-05 06:36:38,526 INFO L87 Difference]: Start difference. First operand 1595 states and 5456 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:36:39,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:36:39,019 INFO L93 Difference]: Finished difference Result 2234 states and 7411 transitions. [2021-06-05 06:36:39,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 06:36:39,020 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:36:39,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:36:39,023 INFO L225 Difference]: With dead ends: 2234 [2021-06-05 06:36:39,023 INFO L226 Difference]: Without dead ends: 2209 [2021-06-05 06:36:39,023 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 3606.3ms TimeCoverageRelationStatistics Valid=199, Invalid=855, Unknown=2, NotChecked=0, Total=1056 [2021-06-05 06:36:39,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2209 states. [2021-06-05 06:36:39,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2209 to 1573. [2021-06-05 06:36:39,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1573 states, 1572 states have (on average 3.422391857506361) internal successors, (5380), 1572 states have internal predecessors, (5380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:36:39,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1573 states to 1573 states and 5380 transitions. [2021-06-05 06:36:39,044 INFO L78 Accepts]: Start accepts. Automaton has 1573 states and 5380 transitions. Word has length 26 [2021-06-05 06:36:39,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:36:39,044 INFO L482 AbstractCegarLoop]: Abstraction has 1573 states and 5380 transitions. [2021-06-05 06:36:39,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:36:39,044 INFO L276 IsEmpty]: Start isEmpty. Operand 1573 states and 5380 transitions. [2021-06-05 06:36:39,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:36:39,046 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:36:39,046 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:36:39,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4244 [2021-06-05 06:36:39,246 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:36:39,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:36:39,247 INFO L82 PathProgramCache]: Analyzing trace with hash -987079049, now seen corresponding path program 42 times [2021-06-05 06:36:39,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:36:39,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691739677] [2021-06-05 06:36:39,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:36:39,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:36:39,347 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:36:39,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:36:39,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691739677] [2021-06-05 06:36:39,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691739677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:36:39,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493280549] [2021-06-05 06:36:39,348 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:36:39,370 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:36:39,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:36:39,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:36:39,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:36:39,537 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:39,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 51 [2021-06-05 06:36:39,570 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:36:39,586 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:39,620 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:39,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 43 [2021-06-05 06:36:39,662 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:36:39,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:39,708 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:39,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 06:36:39,718 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 06:36:39,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:39,824 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:36:39,824 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:59, output treesize:116 [2021-06-05 06:36:39,877 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:36:39,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493280549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:36:39,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:36:39,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 06:36:39,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645137076] [2021-06-05 06:36:39,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:36:39,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:36:39,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:36:39,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:36:39,878 INFO L87 Difference]: Start difference. First operand 1573 states and 5380 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:36:40,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:36:40,355 INFO L93 Difference]: Finished difference Result 2054 states and 6859 transitions. [2021-06-05 06:36:40,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:36:40,356 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:36:40,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:36:40,358 INFO L225 Difference]: With dead ends: 2054 [2021-06-05 06:36:40,358 INFO L226 Difference]: Without dead ends: 2039 [2021-06-05 06:36:40,358 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 454.1ms TimeCoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:36:40,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2039 states. [2021-06-05 06:36:40,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2039 to 1618. [2021-06-05 06:36:40,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1618 states, 1617 states have (on average 3.4162028447742734) internal successors, (5524), 1617 states have internal predecessors, (5524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:36:40,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1618 states to 1618 states and 5524 transitions. [2021-06-05 06:36:40,377 INFO L78 Accepts]: Start accepts. Automaton has 1618 states and 5524 transitions. Word has length 26 [2021-06-05 06:36:40,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:36:40,377 INFO L482 AbstractCegarLoop]: Abstraction has 1618 states and 5524 transitions. [2021-06-05 06:36:40,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:36:40,377 INFO L276 IsEmpty]: Start isEmpty. Operand 1618 states and 5524 transitions. [2021-06-05 06:36:40,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:36:40,378 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:36:40,379 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:36:40,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4263 [2021-06-05 06:36:40,579 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:36:40,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:36:40,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1154888141, now seen corresponding path program 43 times [2021-06-05 06:36:40,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:36:40,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666159653] [2021-06-05 06:36:40,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:36:40,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:36:40,683 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:36:40,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:36:40,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666159653] [2021-06-05 06:36:40,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666159653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:36:40,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776910465] [2021-06-05 06:36:40,683 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:36:40,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:36:40,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:36:40,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:36:40,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:36:40,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:36:40,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-06-05 06:36:40,856 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:36:40,862 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:40,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:36:40,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:36:40,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:36:40,866 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:36:40,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:40,877 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:40,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-05 06:36:40,878 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:36:40,886 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:40,888 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:36:40,888 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-05 06:36:40,904 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:36:40,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776910465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:36:40,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:36:40,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 06:36:40,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747392843] [2021-06-05 06:36:40,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:36:40,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:36:40,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:36:40,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:36:40,905 INFO L87 Difference]: Start difference. First operand 1618 states and 5524 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:36:41,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:36:41,555 INFO L93 Difference]: Finished difference Result 2315 states and 7658 transitions. [2021-06-05 06:36:41,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 06:36:41,555 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:36:41,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:36:41,558 INFO L225 Difference]: With dead ends: 2315 [2021-06-05 06:36:41,558 INFO L226 Difference]: Without dead ends: 2300 [2021-06-05 06:36:41,558 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 527.7ms TimeCoverageRelationStatistics Valid=200, Invalid=792, Unknown=0, NotChecked=0, Total=992 [2021-06-05 06:36:41,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2300 states. [2021-06-05 06:36:41,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2300 to 1619. [2021-06-05 06:36:41,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1619 states, 1618 states have (on average 3.417799752781211) internal successors, (5530), 1618 states have internal predecessors, (5530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:36:41,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1619 states to 1619 states and 5530 transitions. [2021-06-05 06:36:41,579 INFO L78 Accepts]: Start accepts. Automaton has 1619 states and 5530 transitions. Word has length 26 [2021-06-05 06:36:41,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:36:41,579 INFO L482 AbstractCegarLoop]: Abstraction has 1619 states and 5530 transitions. [2021-06-05 06:36:41,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:36:41,579 INFO L276 IsEmpty]: Start isEmpty. Operand 1619 states and 5530 transitions. [2021-06-05 06:36:41,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:36:41,581 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:36:41,581 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:36:41,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4319,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:36:41,781 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:36:41,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:36:41,782 INFO L82 PathProgramCache]: Analyzing trace with hash -856114693, now seen corresponding path program 44 times [2021-06-05 06:36:41,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:36:41,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983560440] [2021-06-05 06:36:41,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:36:41,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:36:41,886 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:36:41,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:36:41,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983560440] [2021-06-05 06:36:41,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983560440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:36:41,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495132183] [2021-06-05 06:36:41,887 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:36:41,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:36:41,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:36:41,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:36:41,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:36:42,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:36:42,044 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:42,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 51 [2021-06-05 06:36:42,084 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:36:42,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:42,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:36:42,113 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:42,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 43 [2021-06-05 06:36:42,163 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:36:42,188 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:42,209 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:42,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 06:36:42,218 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 06:36:42,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:42,335 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 4 xjuncts. [2021-06-05 06:36:42,336 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:59, output treesize:97 [2021-06-05 06:36:42,412 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:36:42,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495132183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:36:42,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:36:42,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 06:36:42,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698972409] [2021-06-05 06:36:42,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:36:42,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:36:42,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:36:42,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:36:42,413 INFO L87 Difference]: Start difference. First operand 1619 states and 5530 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:36:42,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:36:42,743 INFO L93 Difference]: Finished difference Result 2120 states and 7093 transitions. [2021-06-05 06:36:42,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:36:42,744 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:36:42,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:36:42,747 INFO L225 Difference]: With dead ends: 2120 [2021-06-05 06:36:42,747 INFO L226 Difference]: Without dead ends: 2105 [2021-06-05 06:36:42,747 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 392.2ms TimeCoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:36:42,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2105 states. [2021-06-05 06:36:42,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2105 to 1622. [2021-06-05 06:36:42,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1622 states, 1621 states have (on average 3.421344848858729) internal successors, (5546), 1621 states have internal predecessors, (5546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:36:42,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 5546 transitions. [2021-06-05 06:36:42,769 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 5546 transitions. Word has length 26 [2021-06-05 06:36:42,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:36:42,769 INFO L482 AbstractCegarLoop]: Abstraction has 1622 states and 5546 transitions. [2021-06-05 06:36:42,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:36:42,770 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 5546 transitions. [2021-06-05 06:36:42,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:36:42,771 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:36:42,771 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:36:42,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4320 [2021-06-05 06:36:42,985 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:36:42,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:36:42,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1488441339, now seen corresponding path program 45 times [2021-06-05 06:36:42,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:36:42,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639032433] [2021-06-05 06:36:42,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:36:42,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:36:43,076 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:36:43,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:36:43,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639032433] [2021-06-05 06:36:43,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639032433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:36:43,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599909677] [2021-06-05 06:36:43,076 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:36:43,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:36:43,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:36:43,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:36:43,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:36:44,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:36:44,099 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:44,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 51 [2021-06-05 06:36:44,138 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:36:44,156 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:44,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:36:44,168 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:44,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 43 [2021-06-05 06:36:44,200 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:36:44,225 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:44,245 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:44,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 06:36:44,255 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 06:36:44,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:44,368 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 5 xjuncts. [2021-06-05 06:36:44,368 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:59, output treesize:229 [2021-06-05 06:36:44,450 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:36:44,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599909677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:36:44,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:36:44,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 06:36:44,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46893867] [2021-06-05 06:36:44,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:36:44,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:36:44,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:36:44,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=231, Unknown=1, NotChecked=0, Total=306 [2021-06-05 06:36:44,451 INFO L87 Difference]: Start difference. First operand 1622 states and 5546 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:36:44,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:36:44,757 INFO L93 Difference]: Finished difference Result 2150 states and 7189 transitions. [2021-06-05 06:36:44,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:36:44,757 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:36:44,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:36:44,760 INFO L225 Difference]: With dead ends: 2150 [2021-06-05 06:36:44,760 INFO L226 Difference]: Without dead ends: 2135 [2021-06-05 06:36:44,760 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 1245.9ms TimeCoverageRelationStatistics Valid=150, Invalid=499, Unknown=1, NotChecked=0, Total=650 [2021-06-05 06:36:44,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2135 states. [2021-06-05 06:36:44,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2135 to 1640. [2021-06-05 06:36:44,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1640 states, 1639 states have (on average 3.416717510677242) internal successors, (5600), 1639 states have internal predecessors, (5600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:36:44,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1640 states to 1640 states and 5600 transitions. [2021-06-05 06:36:44,779 INFO L78 Accepts]: Start accepts. Automaton has 1640 states and 5600 transitions. Word has length 26 [2021-06-05 06:36:44,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:36:44,779 INFO L482 AbstractCegarLoop]: Abstraction has 1640 states and 5600 transitions. [2021-06-05 06:36:44,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:36:44,779 INFO L276 IsEmpty]: Start isEmpty. Operand 1640 states and 5600 transitions. [2021-06-05 06:36:44,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:36:44,781 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:36:44,781 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:36:44,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4377,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:36:44,981 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:36:44,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:36:44,982 INFO L82 PathProgramCache]: Analyzing trace with hash -2007184673, now seen corresponding path program 46 times [2021-06-05 06:36:44,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:36:44,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963492510] [2021-06-05 06:36:44,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:36:44,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:36:45,082 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:36:45,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:36:45,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963492510] [2021-06-05 06:36:45,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963492510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:36:45,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314605514] [2021-06-05 06:36:45,083 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:36:45,105 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:36:45,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:36:45,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:36:45,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:36:45,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:36:45,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:36:45,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-06-05 06:36:45,280 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:36:45,287 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:45,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:36:45,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:36:45,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:36:45,292 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:36:45,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:45,304 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:45,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-05 06:36:45,306 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:36:45,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:45,315 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:36:45,315 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-05 06:36:45,329 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:36:45,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314605514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:36:45,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:36:45,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 06:36:45,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78452878] [2021-06-05 06:36:45,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:36:45,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:36:45,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:36:45,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:36:45,330 INFO L87 Difference]: Start difference. First operand 1640 states and 5600 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:36:45,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:36:45,695 INFO L93 Difference]: Finished difference Result 2076 states and 6950 transitions. [2021-06-05 06:36:45,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:36:45,696 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:36:45,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:36:45,698 INFO L225 Difference]: With dead ends: 2076 [2021-06-05 06:36:45,698 INFO L226 Difference]: Without dead ends: 2061 [2021-06-05 06:36:45,699 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 384.8ms TimeCoverageRelationStatistics Valid=163, Invalid=649, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:36:45,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2061 states. [2021-06-05 06:36:45,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2061 to 1661. [2021-06-05 06:36:45,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1661 states, 1660 states have (on average 3.4126506024096384) internal successors, (5665), 1660 states have internal predecessors, (5665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:36:45,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1661 states to 1661 states and 5665 transitions. [2021-06-05 06:36:45,717 INFO L78 Accepts]: Start accepts. Automaton has 1661 states and 5665 transitions. Word has length 26 [2021-06-05 06:36:45,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:36:45,717 INFO L482 AbstractCegarLoop]: Abstraction has 1661 states and 5665 transitions. [2021-06-05 06:36:45,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:36:45,717 INFO L276 IsEmpty]: Start isEmpty. Operand 1661 states and 5665 transitions. [2021-06-05 06:36:45,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:36:45,719 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:36:45,719 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:36:45,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4433,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:36:45,929 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:36:45,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:36:45,929 INFO L82 PathProgramCache]: Analyzing trace with hash 670249843, now seen corresponding path program 47 times [2021-06-05 06:36:45,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:36:45,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802872119] [2021-06-05 06:36:45,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:36:45,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:36:46,048 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:36:46,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:36:46,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802872119] [2021-06-05 06:36:46,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802872119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:36:46,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198252623] [2021-06-05 06:36:46,048 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:36:46,071 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:36:46,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:36:46,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:36:46,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:36:46,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:36:46,219 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:46,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-06-05 06:36:46,234 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:36:46,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:46,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:36:46,252 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:46,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-05 06:36:46,267 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:36:46,281 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:46,298 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:46,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 06:36:46,307 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 06:36:46,351 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:46,364 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:36:46,364 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:52, output treesize:19 [2021-06-05 06:36:46,399 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:36:46,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198252623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:36:46,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:36:46,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 06:36:46,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310592882] [2021-06-05 06:36:46,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:36:46,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:36:46,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:36:46,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:36:46,400 INFO L87 Difference]: Start difference. First operand 1661 states and 5665 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:36:46,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:36:46,973 INFO L93 Difference]: Finished difference Result 2366 states and 7851 transitions. [2021-06-05 06:36:46,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 06:36:46,973 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:36:46,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:36:46,976 INFO L225 Difference]: With dead ends: 2366 [2021-06-05 06:36:46,977 INFO L226 Difference]: Without dead ends: 2351 [2021-06-05 06:36:46,977 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 505.1ms TimeCoverageRelationStatistics Valid=232, Invalid=890, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 06:36:46,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2351 states. [2021-06-05 06:36:46,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2351 to 1658. [2021-06-05 06:36:46,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1658 states, 1657 states have (on average 3.4140012070006036) internal successors, (5657), 1657 states have internal predecessors, (5657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:36:46,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 5657 transitions. [2021-06-05 06:36:46,998 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 5657 transitions. Word has length 26 [2021-06-05 06:36:46,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:36:46,998 INFO L482 AbstractCegarLoop]: Abstraction has 1658 states and 5657 transitions. [2021-06-05 06:36:46,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:36:46,998 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 5657 transitions. [2021-06-05 06:36:47,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:36:47,000 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:36:47,000 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:36:47,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4434,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:36:47,200 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:36:47,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:36:47,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1019693061, now seen corresponding path program 48 times [2021-06-05 06:36:47,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:36:47,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121354672] [2021-06-05 06:36:47,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:36:47,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:36:47,300 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:36:47,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:36:47,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121354672] [2021-06-05 06:36:47,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121354672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:36:47,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458528298] [2021-06-05 06:36:47,300 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:36:47,324 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:36:47,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:36:47,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:36:47,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:36:47,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:36:47,438 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:47,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-06-05 06:36:47,453 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:36:47,463 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:47,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:36:47,470 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:47,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-05 06:36:47,486 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:36:47,499 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:47,516 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:47,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 06:36:47,520 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 06:36:47,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:47,567 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:36:47,567 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:49, output treesize:15 [2021-06-05 06:36:47,603 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:36:47,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458528298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:36:47,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:36:47,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 06:36:47,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680374784] [2021-06-05 06:36:47,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:36:47,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:36:47,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:36:47,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:36:47,604 INFO L87 Difference]: Start difference. First operand 1658 states and 5657 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:36:48,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:36:48,065 INFO L93 Difference]: Finished difference Result 2228 states and 7412 transitions. [2021-06-05 06:36:48,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:36:48,065 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:36:48,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:36:48,068 INFO L225 Difference]: With dead ends: 2228 [2021-06-05 06:36:48,068 INFO L226 Difference]: Without dead ends: 2203 [2021-06-05 06:36:48,068 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 420.6ms TimeCoverageRelationStatistics Valid=165, Invalid=647, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:36:48,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2203 states. [2021-06-05 06:36:48,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2203 to 1658. [2021-06-05 06:36:48,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1658 states, 1657 states have (on average 3.4164152082076042) internal successors, (5661), 1657 states have internal predecessors, (5661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:36:48,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 5661 transitions. [2021-06-05 06:36:48,088 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 5661 transitions. Word has length 26 [2021-06-05 06:36:48,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:36:48,088 INFO L482 AbstractCegarLoop]: Abstraction has 1658 states and 5661 transitions. [2021-06-05 06:36:48,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:36:48,088 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 5661 transitions. [2021-06-05 06:36:48,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:36:48,090 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:36:48,090 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:36:48,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4453 [2021-06-05 06:36:48,292 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:36:48,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:36:48,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1464847671, now seen corresponding path program 49 times [2021-06-05 06:36:48,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:36:48,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453501756] [2021-06-05 06:36:48,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:36:48,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:36:48,398 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:36:48,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:36:48,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453501756] [2021-06-05 06:36:48,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453501756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:36:48,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974989544] [2021-06-05 06:36:48,399 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:36:48,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:36:48,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:36:48,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:36:50,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:36:50,182 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:50,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-06-05 06:36:50,198 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:36:50,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:50,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:36:50,216 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:50,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-05 06:36:50,232 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:36:50,246 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:50,262 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:50,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 06:36:50,269 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 06:36:50,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:36:50,323 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:36:50,323 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:54, output treesize:36 [2021-06-05 06:36:50,369 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:36:50,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974989544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:36:50,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:36:50,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 06:36:50,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076600838] [2021-06-05 06:36:50,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:36:50,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:36:50,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:36:50,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=233, Unknown=1, NotChecked=0, Total=306 [2021-06-05 06:36:50,370 INFO L87 Difference]: Start difference. First operand 1658 states and 5661 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:37:05,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:37:05,996 INFO L93 Difference]: Finished difference Result 2151 states and 7200 transitions. [2021-06-05 06:37:05,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:37:05,996 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:37:05,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:37:05,999 INFO L225 Difference]: With dead ends: 2151 [2021-06-05 06:37:05,999 INFO L226 Difference]: Without dead ends: 2136 [2021-06-05 06:37:05,999 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1952.5ms TimeCoverageRelationStatistics Valid=143, Invalid=506, Unknown=1, NotChecked=0, Total=650 [2021-06-05 06:37:06,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2136 states. [2021-06-05 06:37:06,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2136 to 1658. [2021-06-05 06:37:06,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1658 states, 1657 states have (on average 3.4164152082076042) internal successors, (5661), 1657 states have internal predecessors, (5661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:37:06,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 5661 transitions. [2021-06-05 06:37:06,018 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 5661 transitions. Word has length 26 [2021-06-05 06:37:06,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:37:06,018 INFO L482 AbstractCegarLoop]: Abstraction has 1658 states and 5661 transitions. [2021-06-05 06:37:06,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:37:06,018 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 5661 transitions. [2021-06-05 06:37:06,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:37:06,020 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:37:06,020 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:37:06,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4470 [2021-06-05 06:37:06,222 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:37:06,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:37:06,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1829221231, now seen corresponding path program 56 times [2021-06-05 06:37:06,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:37:06,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918027797] [2021-06-05 06:37:06,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:37:06,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:37:06,387 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:37:06,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:37:06,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918027797] [2021-06-05 06:37:06,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918027797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:37:06,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548538220] [2021-06-05 06:37:06,387 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:37:06,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:37:06,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:37:06,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 06:37:06,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:37:06,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:37:06,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:37:06,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:37:06,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-06-05 06:37:06,528 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:37:06,537 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:37:06,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:37:06,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:37:06,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:37:06,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 06:37:06,542 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:37:06,550 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:37:06,556 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:37:06,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-05 06:37:06,558 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:37:06,568 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:37:06,569 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:37:06,569 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:59, output treesize:10 [2021-06-05 06:37:06,598 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:37:06,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548538220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:37:06,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:37:06,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 06:37:06,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716409482] [2021-06-05 06:37:06,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:37:06,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:37:06,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:37:06,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:37:06,599 INFO L87 Difference]: Start difference. First operand 1658 states and 5661 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:37:06,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:37:06,965 INFO L93 Difference]: Finished difference Result 2204 states and 7221 transitions. [2021-06-05 06:37:06,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 06:37:06,965 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:37:06,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:37:06,968 INFO L225 Difference]: With dead ends: 2204 [2021-06-05 06:37:06,968 INFO L226 Difference]: Without dead ends: 2152 [2021-06-05 06:37:06,968 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 466.7ms TimeCoverageRelationStatistics Valid=191, Invalid=739, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:37:06,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2021-06-05 06:37:06,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 1676. [2021-06-05 06:37:06,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1676 states, 1675 states have (on average 3.4077611940298507) internal successors, (5708), 1675 states have internal predecessors, (5708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:37:06,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 5708 transitions. [2021-06-05 06:37:06,987 INFO L78 Accepts]: Start accepts. Automaton has 1676 states and 5708 transitions. Word has length 26 [2021-06-05 06:37:06,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:37:06,987 INFO L482 AbstractCegarLoop]: Abstraction has 1676 states and 5708 transitions. [2021-06-05 06:37:06,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:37:06,987 INFO L276 IsEmpty]: Start isEmpty. Operand 1676 states and 5708 transitions. [2021-06-05 06:37:06,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:37:06,989 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:37:06,989 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:37:07,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4489,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:37:07,190 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:37:07,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:37:07,190 INFO L82 PathProgramCache]: Analyzing trace with hash 554911219, now seen corresponding path program 57 times [2021-06-05 06:37:07,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:37:07,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200827185] [2021-06-05 06:37:07,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:37:07,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:37:07,349 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:37:07,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:37:07,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200827185] [2021-06-05 06:37:07,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200827185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:37:07,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21136266] [2021-06-05 06:37:07,349 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:37:07,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:37:07,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:37:07,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:37:07,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:37:09,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:37:09,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:37:09,504 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:37:09,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 69 [2021-06-05 06:37:09,581 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 06:37:09,601 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:37:09,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:37:09,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:37:09,616 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:37:09,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 57 [2021-06-05 06:37:09,688 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 06:37:09,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:37:09,756 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:37:09,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 83 [2021-06-05 06:37:09,922 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 06:37:10,561 WARN L205 SmtUtils]: Spent 638.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 118 [2021-06-05 06:37:10,562 INFO L628 ElimStorePlain]: treesize reduction 632, result has 68.1 percent of original size [2021-06-05 06:37:10,849 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:37:10,849 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:62, output treesize:63 [2021-06-05 06:37:10,898 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:37:10,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21136266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:37:10,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:37:10,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 06:37:10,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738077847] [2021-06-05 06:37:10,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:37:10,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:37:10,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:37:10,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=278, Unknown=1, NotChecked=0, Total=342 [2021-06-05 06:37:10,899 INFO L87 Difference]: Start difference. First operand 1676 states and 5708 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:38:07,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:38:07,594 INFO L93 Difference]: Finished difference Result 2373 states and 7814 transitions. [2021-06-05 06:38:07,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 06:38:07,594 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:38:07,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:38:07,597 INFO L225 Difference]: With dead ends: 2373 [2021-06-05 06:38:07,598 INFO L226 Difference]: Without dead ends: 2358 [2021-06-05 06:38:07,598 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 22224.7ms TimeCoverageRelationStatistics Valid=360, Invalid=1791, Unknown=11, NotChecked=0, Total=2162 [2021-06-05 06:38:07,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2358 states. [2021-06-05 06:38:07,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2358 to 1672. [2021-06-05 06:38:07,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1672 states, 1671 states have (on average 3.40754039497307) internal successors, (5694), 1671 states have internal predecessors, (5694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:38:07,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1672 states to 1672 states and 5694 transitions. [2021-06-05 06:38:07,620 INFO L78 Accepts]: Start accepts. Automaton has 1672 states and 5694 transitions. Word has length 26 [2021-06-05 06:38:07,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:38:07,620 INFO L482 AbstractCegarLoop]: Abstraction has 1672 states and 5694 transitions. [2021-06-05 06:38:07,620 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:38:07,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1672 states and 5694 transitions. [2021-06-05 06:38:07,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:38:07,622 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:38:07,622 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:38:07,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4490,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:38:07,838 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:38:07,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:38:07,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1130156151, now seen corresponding path program 58 times [2021-06-05 06:38:07,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:38:07,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354518372] [2021-06-05 06:38:07,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:38:07,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:38:07,962 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:38:07,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:38:07,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354518372] [2021-06-05 06:38:07,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354518372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:38:07,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537554194] [2021-06-05 06:38:07,963 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:38:07,985 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:38:07,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:38:07,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:38:07,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:38:08,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:38:08,164 INFO L354 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2021-06-05 06:38:08,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 237 treesize of output 217 [2021-06-05 06:38:08,244 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 06:38:08,268 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:38:08,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:38:08,297 INFO L354 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2021-06-05 06:38:08,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 221 treesize of output 195 [2021-06-05 06:38:08,439 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 06:38:08,473 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:38:08,501 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:38:08,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 193 treesize of output 177 [2021-06-05 06:38:08,733 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:38:09,214 WARN L205 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 125 [2021-06-05 06:38:09,215 INFO L628 ElimStorePlain]: treesize reduction 178, result has 90.9 percent of original size [2021-06-05 06:38:09,438 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 148 [2021-06-05 06:38:09,653 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:38:09,653 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:242, output treesize:27 [2021-06-05 06:38:09,686 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:38:09,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537554194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:38:09,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:38:09,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 06:38:09,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885921627] [2021-06-05 06:38:09,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:38:09,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:38:09,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:38:09,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:38:09,687 INFO L87 Difference]: Start difference. First operand 1672 states and 5694 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:38:10,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:38:10,374 INFO L93 Difference]: Finished difference Result 2003 states and 6539 transitions. [2021-06-05 06:38:10,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 06:38:10,375 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:38:10,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:38:10,378 INFO L225 Difference]: With dead ends: 2003 [2021-06-05 06:38:10,378 INFO L226 Difference]: Without dead ends: 1981 [2021-06-05 06:38:10,378 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 670.7ms TimeCoverageRelationStatistics Valid=202, Invalid=1058, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 06:38:10,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1981 states. [2021-06-05 06:38:10,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1981 to 1674. [2021-06-05 06:38:10,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1674 states, 1673 states have (on average 3.4076509264793784) internal successors, (5701), 1673 states have internal predecessors, (5701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:38:10,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 5701 transitions. [2021-06-05 06:38:10,398 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 5701 transitions. Word has length 26 [2021-06-05 06:38:10,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:38:10,398 INFO L482 AbstractCegarLoop]: Abstraction has 1674 states and 5701 transitions. [2021-06-05 06:38:10,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:38:10,398 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 5701 transitions. [2021-06-05 06:38:10,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:38:10,400 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:38:10,400 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:38:10,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4602,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:38:10,601 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:38:10,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:38:10,601 INFO L82 PathProgramCache]: Analyzing trace with hash -2096936581, now seen corresponding path program 59 times [2021-06-05 06:38:10,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:38:10,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040731050] [2021-06-05 06:38:10,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:38:10,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:38:10,753 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:38:10,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:38:10,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040731050] [2021-06-05 06:38:10,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040731050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:38:10,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856682873] [2021-06-05 06:38:10,753 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:38:10,784 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:38:10,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:38:10,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:38:10,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:38:12,647 WARN L205 SmtUtils]: Spent 877.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-06-05 06:38:12,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:38:12,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:38:12,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:38:12,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:38:12,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-06-05 06:38:12,658 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:38:12,665 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:38:12,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:38:12,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:38:12,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:38:12,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:38:12,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 06:38:12,670 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:38:12,677 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:38:12,682 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:38:12,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-05 06:38:12,684 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:38:12,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:38:12,693 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:38:12,693 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-05 06:38:12,709 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:38:12,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856682873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:38:12,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:38:12,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2021-06-05 06:38:12,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666401085] [2021-06-05 06:38:12,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:38:12,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:38:12,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:38:12,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=182, Unknown=1, NotChecked=0, Total=240 [2021-06-05 06:38:12,710 INFO L87 Difference]: Start difference. First operand 1674 states and 5701 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:38:16,518 WARN L205 SmtUtils]: Spent 933.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-06-05 06:38:19,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:38:19,677 INFO L93 Difference]: Finished difference Result 2047 states and 6837 transitions. [2021-06-05 06:38:19,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:38:19,678 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:38:19,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:38:19,680 INFO L225 Difference]: With dead ends: 2047 [2021-06-05 06:38:19,681 INFO L226 Difference]: Without dead ends: 2016 [2021-06-05 06:38:19,681 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 3070.2ms TimeCoverageRelationStatistics Valid=152, Invalid=549, Unknown=1, NotChecked=0, Total=702 [2021-06-05 06:38:19,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2016 states. [2021-06-05 06:38:19,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2016 to 1680. [2021-06-05 06:38:19,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1680 states, 1679 states have (on average 3.405598570577725) internal successors, (5718), 1679 states have internal predecessors, (5718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:38:19,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 5718 transitions. [2021-06-05 06:38:19,699 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 5718 transitions. Word has length 26 [2021-06-05 06:38:19,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:38:19,699 INFO L482 AbstractCegarLoop]: Abstraction has 1680 states and 5718 transitions. [2021-06-05 06:38:19,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:38:19,699 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 5718 transitions. [2021-06-05 06:38:19,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:38:19,701 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:38:19,701 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:38:19,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4721,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:38:19,902 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:38:19,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:38:19,902 INFO L82 PathProgramCache]: Analyzing trace with hash 540764283, now seen corresponding path program 60 times [2021-06-05 06:38:19,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:38:19,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124543452] [2021-06-05 06:38:19,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:38:19,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:38:20,026 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:38:20,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:38:20,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124543452] [2021-06-05 06:38:20,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124543452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:38:20,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755450313] [2021-06-05 06:38:20,027 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:38:20,050 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:38:20,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:38:20,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:38:20,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:38:23,782 WARN L205 SmtUtils]: Spent 1.08 s on a formula simplification that was a NOOP. DAG size: 32 [2021-06-05 06:38:23,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:38:23,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:38:23,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:38:23,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:38:23,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-06-05 06:38:23,839 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:38:23,846 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:38:23,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:38:23,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:38:23,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:38:23,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:38:23,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 06:38:23,854 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:38:23,893 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:38:23,899 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:38:23,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-05 06:38:23,901 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:38:23,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:38:23,910 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:38:23,910 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-05 06:38:23,928 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:38:23,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755450313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:38:23,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:38:23,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-05 06:38:23,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436496675] [2021-06-05 06:38:23,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:38:23,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:38:23,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:38:23,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=212, Unknown=3, NotChecked=0, Total=272 [2021-06-05 06:38:23,929 INFO L87 Difference]: Start difference. First operand 1680 states and 5718 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:38:34,435 WARN L205 SmtUtils]: Spent 908.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-06-05 06:38:37,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:38:37,108 INFO L93 Difference]: Finished difference Result 2079 states and 6921 transitions. [2021-06-05 06:38:37,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 06:38:37,109 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:38:37,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:38:37,112 INFO L225 Difference]: With dead ends: 2079 [2021-06-05 06:38:37,112 INFO L226 Difference]: Without dead ends: 2064 [2021-06-05 06:38:37,112 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 7394.7ms TimeCoverageRelationStatistics Valid=158, Invalid=592, Unknown=6, NotChecked=0, Total=756 [2021-06-05 06:38:37,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2064 states. [2021-06-05 06:38:37,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2064 to 1680. [2021-06-05 06:38:37,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1680 states, 1679 states have (on average 3.405598570577725) internal successors, (5718), 1679 states have internal predecessors, (5718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:38:37,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 5718 transitions. [2021-06-05 06:38:37,134 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 5718 transitions. Word has length 26 [2021-06-05 06:38:37,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:38:37,134 INFO L482 AbstractCegarLoop]: Abstraction has 1680 states and 5718 transitions. [2021-06-05 06:38:37,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:38:37,134 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 5718 transitions. [2021-06-05 06:38:37,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:38:37,136 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:38:37,136 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:38:37,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4722 [2021-06-05 06:38:37,337 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:38:37,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:38:37,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1112511237, now seen corresponding path program 50 times [2021-06-05 06:38:37,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:38:37,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605883101] [2021-06-05 06:38:37,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:38:37,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:38:37,505 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:38:37,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:38:37,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605883101] [2021-06-05 06:38:37,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605883101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:38:37,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570139113] [2021-06-05 06:38:37,505 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:38:37,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:38:37,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:38:37,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:38:37,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:38:37,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:38:37,666 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:38:37,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-06-05 06:38:37,681 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:38:37,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:38:37,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:38:37,697 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:38:37,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-05 06:38:37,713 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:38:37,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:38:37,743 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:38:37,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 06:38:37,752 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 06:38:37,796 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:38:37,809 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:38:37,809 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:49, output treesize:15 [2021-06-05 06:38:37,842 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:38:37,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570139113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:38:37,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:38:37,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 06:38:37,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928709791] [2021-06-05 06:38:37,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:38:37,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:38:37,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:38:37,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:38:37,843 INFO L87 Difference]: Start difference. First operand 1680 states and 5718 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:38:38,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:38:38,985 INFO L93 Difference]: Finished difference Result 2348 states and 7703 transitions. [2021-06-05 06:38:38,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 06:38:38,986 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:38:38,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:38:38,988 INFO L225 Difference]: With dead ends: 2348 [2021-06-05 06:38:38,989 INFO L226 Difference]: Without dead ends: 2333 [2021-06-05 06:38:38,989 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 906.2ms TimeCoverageRelationStatistics Valid=282, Invalid=1358, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 06:38:38,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2333 states. [2021-06-05 06:38:39,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2333 to 1687. [2021-06-05 06:38:39,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1687 states, 1686 states have (on average 3.4056939501779357) internal successors, (5742), 1686 states have internal predecessors, (5742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:38:39,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1687 states to 1687 states and 5742 transitions. [2021-06-05 06:38:39,009 INFO L78 Accepts]: Start accepts. Automaton has 1687 states and 5742 transitions. Word has length 26 [2021-06-05 06:38:39,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:38:39,009 INFO L482 AbstractCegarLoop]: Abstraction has 1687 states and 5742 transitions. [2021-06-05 06:38:39,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:38:39,010 INFO L276 IsEmpty]: Start isEmpty. Operand 1687 states and 5742 transitions. [2021-06-05 06:38:39,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:38:39,011 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:38:39,011 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:38:39,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4723,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:38:39,216 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:38:39,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:38:39,216 INFO L82 PathProgramCache]: Analyzing trace with hash 437870327, now seen corresponding path program 61 times [2021-06-05 06:38:39,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:38:39,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850102019] [2021-06-05 06:38:39,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:38:39,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:38:39,315 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:38:39,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:38:39,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850102019] [2021-06-05 06:38:39,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850102019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:38:39,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764003154] [2021-06-05 06:38:39,315 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:38:39,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:38:39,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:38:39,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:38:39,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:38:39,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:38:39,529 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:38:39,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 63 [2021-06-05 06:38:39,606 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 06:38:39,626 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:38:39,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:38:39,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:38:39,642 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:38:39,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 53 [2021-06-05 06:38:39,734 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 06:38:39,766 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:38:39,803 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:38:39,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 83 [2021-06-05 06:38:39,972 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 06:38:40,371 WARN L205 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 118 [2021-06-05 06:38:40,372 INFO L628 ElimStorePlain]: treesize reduction 120, result has 92.5 percent of original size [2021-06-05 06:38:40,733 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:38:40,733 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:58, output treesize:98 [2021-06-05 06:38:40,767 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:38:40,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764003154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:38:40,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:38:40,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-05 06:38:40,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930155619] [2021-06-05 06:38:40,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:38:40,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:38:40,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:38:40,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:38:40,768 INFO L87 Difference]: Start difference. First operand 1687 states and 5742 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:38:42,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:38:42,320 INFO L93 Difference]: Finished difference Result 2521 states and 7986 transitions. [2021-06-05 06:38:42,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 06:38:42,321 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:38:42,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:38:42,324 INFO L225 Difference]: With dead ends: 2521 [2021-06-05 06:38:42,324 INFO L226 Difference]: Without dead ends: 2484 [2021-06-05 06:38:42,324 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 1212.6ms TimeCoverageRelationStatistics Valid=353, Invalid=1999, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 06:38:42,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2484 states. [2021-06-05 06:38:42,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2484 to 1718. [2021-06-05 06:38:42,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1718 states, 1717 states have (on average 3.4111822947000583) internal successors, (5857), 1717 states have internal predecessors, (5857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:38:42,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1718 states to 1718 states and 5857 transitions. [2021-06-05 06:38:42,348 INFO L78 Accepts]: Start accepts. Automaton has 1718 states and 5857 transitions. Word has length 26 [2021-06-05 06:38:42,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:38:42,348 INFO L482 AbstractCegarLoop]: Abstraction has 1718 states and 5857 transitions. [2021-06-05 06:38:42,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:38:42,348 INFO L276 IsEmpty]: Start isEmpty. Operand 1718 states and 5857 transitions. [2021-06-05 06:38:42,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:38:42,350 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:38:42,350 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:38:42,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4741,112 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:38:42,551 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:38:42,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:38:42,551 INFO L82 PathProgramCache]: Analyzing trace with hash 663863851, now seen corresponding path program 62 times [2021-06-05 06:38:42,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:38:42,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485050968] [2021-06-05 06:38:42,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:38:42,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:38:42,658 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:38:42,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:38:42,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485050968] [2021-06-05 06:38:42,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485050968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:38:42,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78913098] [2021-06-05 06:38:42,658 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:38:42,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:38:42,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:38:42,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:38:42,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:38:42,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:38:42,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:38:42,806 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:38:42,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 63 [2021-06-05 06:38:42,882 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 06:38:42,900 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:38:42,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:38:42,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:38:42,915 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:38:42,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 53 [2021-06-05 06:38:42,994 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 06:38:43,022 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:38:43,062 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:38:43,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 83 [2021-06-05 06:38:43,249 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 06:38:43,740 WARN L205 SmtUtils]: Spent 490.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 123 [2021-06-05 06:38:43,740 INFO L628 ElimStorePlain]: treesize reduction 260, result has 86.7 percent of original size [2021-06-05 06:38:44,286 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:38:44,286 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:53, output treesize:149 [2021-06-05 06:38:44,337 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:38:44,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78913098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:38:44,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:38:44,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 06:38:44,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239594375] [2021-06-05 06:38:44,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:38:44,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:38:44,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:38:44,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:38:44,338 INFO L87 Difference]: Start difference. First operand 1718 states and 5857 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:38:45,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:38:45,179 INFO L93 Difference]: Finished difference Result 2981 states and 9498 transitions. [2021-06-05 06:38:45,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 06:38:45,179 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:38:45,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:38:45,183 INFO L225 Difference]: With dead ends: 2981 [2021-06-05 06:38:45,184 INFO L226 Difference]: Without dead ends: 2944 [2021-06-05 06:38:45,184 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 647.9ms TimeCoverageRelationStatistics Valid=302, Invalid=1180, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 06:38:45,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2944 states. [2021-06-05 06:38:45,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2944 to 1737. [2021-06-05 06:38:45,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1737 states, 1736 states have (on average 3.4164746543778803) internal successors, (5931), 1736 states have internal predecessors, (5931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:38:45,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1737 states to 1737 states and 5931 transitions. [2021-06-05 06:38:45,212 INFO L78 Accepts]: Start accepts. Automaton has 1737 states and 5931 transitions. Word has length 26 [2021-06-05 06:38:45,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:38:45,212 INFO L482 AbstractCegarLoop]: Abstraction has 1737 states and 5931 transitions. [2021-06-05 06:38:45,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:38:45,212 INFO L276 IsEmpty]: Start isEmpty. Operand 1737 states and 5931 transitions. [2021-06-05 06:38:45,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:38:45,214 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:38:45,214 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:38:45,430 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4890 [2021-06-05 06:38:45,430 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:38:45,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:38:45,430 INFO L82 PathProgramCache]: Analyzing trace with hash 53047903, now seen corresponding path program 51 times [2021-06-05 06:38:45,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:38:45,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116230861] [2021-06-05 06:38:45,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:38:45,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:38:45,564 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:38:45,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:38:45,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116230861] [2021-06-05 06:38:45,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116230861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:38:45,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767537595] [2021-06-05 06:38:45,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:38:45,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:38:45,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:38:45,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:38:45,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:38:48,748 WARN L205 SmtUtils]: Spent 766.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-06-05 06:38:48,786 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:38:48,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 59 [2021-06-05 06:38:48,847 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:38:48,869 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:38:48,886 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:38:48,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 51 [2021-06-05 06:38:48,964 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:38:49,001 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:38:49,026 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:38:49,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 06:38:49,036 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 06:38:49,105 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:38:49,217 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 9 xjuncts. [2021-06-05 06:38:49,218 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:61, output treesize:349 [2021-06-05 06:38:49,388 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 38 [2021-06-05 06:38:49,411 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:38:49,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767537595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:38:49,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:38:49,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 06:38:49,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631522995] [2021-06-05 06:38:49,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:38:49,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:38:49,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:38:49,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=250, Unknown=2, NotChecked=0, Total=306 [2021-06-05 06:38:49,412 INFO L87 Difference]: Start difference. First operand 1737 states and 5931 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:39:30,550 WARN L205 SmtUtils]: Spent 1.15 s on a formula simplification that was a NOOP. DAG size: 46 [2021-06-05 06:39:40,550 WARN L205 SmtUtils]: Spent 3.61 s on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2021-06-05 06:39:54,569 WARN L205 SmtUtils]: Spent 3.75 s on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2021-06-05 06:40:01,130 WARN L205 SmtUtils]: Spent 1.44 s on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2021-06-05 06:40:02,375 WARN L205 SmtUtils]: Spent 1.22 s on a formula simplification that was a NOOP. DAG size: 53 [2021-06-05 06:40:16,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:40:16,005 INFO L93 Difference]: Finished difference Result 2397 states and 7851 transitions. [2021-06-05 06:40:16,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 06:40:16,005 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:40:16,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:40:16,008 INFO L225 Difference]: With dead ends: 2397 [2021-06-05 06:40:16,008 INFO L226 Difference]: Without dead ends: 2382 [2021-06-05 06:40:16,009 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 39803.7ms TimeCoverageRelationStatistics Valid=297, Invalid=1666, Unknown=17, NotChecked=0, Total=1980 [2021-06-05 06:40:16,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2382 states. [2021-06-05 06:40:16,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2382 to 1750. [2021-06-05 06:40:16,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1750 states, 1749 states have (on average 3.4128073184676957) internal successors, (5969), 1749 states have internal predecessors, (5969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:40:16,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1750 states to 1750 states and 5969 transitions. [2021-06-05 06:40:16,030 INFO L78 Accepts]: Start accepts. Automaton has 1750 states and 5969 transitions. Word has length 26 [2021-06-05 06:40:16,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:40:16,030 INFO L482 AbstractCegarLoop]: Abstraction has 1750 states and 5969 transitions. [2021-06-05 06:40:16,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:40:16,030 INFO L276 IsEmpty]: Start isEmpty. Operand 1750 states and 5969 transitions. [2021-06-05 06:40:16,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:40:16,032 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:40:16,032 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:40:16,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5045 [2021-06-05 06:40:16,232 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:40:16,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:40:16,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1564484877, now seen corresponding path program 52 times [2021-06-05 06:40:16,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:40:16,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888962330] [2021-06-05 06:40:16,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:40:16,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:40:16,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:40:16,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:40:16,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888962330] [2021-06-05 06:40:16,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888962330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:40:16,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122678557] [2021-06-05 06:40:16,355 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:40:16,378 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:40:16,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:40:16,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:40:16,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:40:16,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:40:16,493 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:40:16,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-06-05 06:40:16,510 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:40:16,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:40:16,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:40:16,529 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:40:16,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-05 06:40:16,545 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:40:16,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:40:16,576 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:40:16,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 06:40:16,581 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 06:40:16,621 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:40:16,633 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:40:16,633 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:54, output treesize:19 [2021-06-05 06:40:16,667 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:40:16,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122678557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:40:16,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:40:16,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 06:40:16,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394472288] [2021-06-05 06:40:16,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:40:16,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:40:16,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:40:16,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:40:16,668 INFO L87 Difference]: Start difference. First operand 1750 states and 5969 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:40:17,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:40:17,559 INFO L93 Difference]: Finished difference Result 2548 states and 8435 transitions. [2021-06-05 06:40:17,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 06:40:17,559 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:40:17,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:40:17,563 INFO L225 Difference]: With dead ends: 2548 [2021-06-05 06:40:17,563 INFO L226 Difference]: Without dead ends: 2533 [2021-06-05 06:40:17,563 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 594.8ms TimeCoverageRelationStatistics Valid=274, Invalid=986, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 06:40:17,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2533 states. [2021-06-05 06:40:17,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2533 to 1753. [2021-06-05 06:40:17,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1753 states, 1752 states have (on average 3.4121004566210047) internal successors, (5978), 1752 states have internal predecessors, (5978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:40:17,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1753 states to 1753 states and 5978 transitions. [2021-06-05 06:40:17,585 INFO L78 Accepts]: Start accepts. Automaton has 1753 states and 5978 transitions. Word has length 26 [2021-06-05 06:40:17,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:40:17,585 INFO L482 AbstractCegarLoop]: Abstraction has 1753 states and 5978 transitions. [2021-06-05 06:40:17,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:40:17,586 INFO L276 IsEmpty]: Start isEmpty. Operand 1753 states and 5978 transitions. [2021-06-05 06:40:17,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:40:17,587 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:40:17,587 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:40:17,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5156 [2021-06-05 06:40:17,788 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:40:17,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:40:17,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1040539515, now seen corresponding path program 53 times [2021-06-05 06:40:17,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:40:17,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584217966] [2021-06-05 06:40:17,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:40:17,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:40:17,913 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:40:17,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:40:17,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584217966] [2021-06-05 06:40:17,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584217966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:40:17,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308074327] [2021-06-05 06:40:17,914 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:40:17,937 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:40:17,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:40:17,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:40:17,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:40:18,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:40:18,044 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:40:18,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-06-05 06:40:18,060 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:40:18,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:40:18,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:40:18,076 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:40:18,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-05 06:40:18,091 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:40:18,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:40:18,121 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:40:18,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 06:40:18,125 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 06:40:18,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:40:18,178 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:40:18,178 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:49, output treesize:15 [2021-06-05 06:40:18,237 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:40:18,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308074327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:40:18,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:40:18,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 06:40:18,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379099270] [2021-06-05 06:40:18,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:40:18,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:40:18,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:40:18,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:40:18,238 INFO L87 Difference]: Start difference. First operand 1753 states and 5978 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:40:19,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:40:19,075 INFO L93 Difference]: Finished difference Result 2448 states and 8097 transitions. [2021-06-05 06:40:19,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 06:40:19,075 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:40:19,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:40:19,078 INFO L225 Difference]: With dead ends: 2448 [2021-06-05 06:40:19,078 INFO L226 Difference]: Without dead ends: 2423 [2021-06-05 06:40:19,079 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 676.5ms TimeCoverageRelationStatistics Valid=258, Invalid=1074, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 06:40:19,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2423 states. [2021-06-05 06:40:19,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2423 to 1739. [2021-06-05 06:40:19,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1739 states, 1738 states have (on average 3.4177215189873418) internal successors, (5940), 1738 states have internal predecessors, (5940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:40:19,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1739 states to 1739 states and 5940 transitions. [2021-06-05 06:40:19,099 INFO L78 Accepts]: Start accepts. Automaton has 1739 states and 5940 transitions. Word has length 26 [2021-06-05 06:40:19,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:40:19,100 INFO L482 AbstractCegarLoop]: Abstraction has 1739 states and 5940 transitions. [2021-06-05 06:40:19,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:40:19,100 INFO L276 IsEmpty]: Start isEmpty. Operand 1739 states and 5940 transitions. [2021-06-05 06:40:19,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:40:19,102 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:40:19,102 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:40:19,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5175 [2021-06-05 06:40:19,316 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:40:19,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:40:19,317 INFO L82 PathProgramCache]: Analyzing trace with hash -366405619, now seen corresponding path program 63 times [2021-06-05 06:40:19,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:40:19,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164539277] [2021-06-05 06:40:19,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:40:19,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:40:19,437 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:40:19,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:40:19,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164539277] [2021-06-05 06:40:19,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164539277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:40:19,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147785306] [2021-06-05 06:40:19,437 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:40:19,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:40:19,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:40:19,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:40:19,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:40:19,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:40:19,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:40:19,580 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:40:19,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 65 [2021-06-05 06:40:19,661 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 06:40:19,682 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:40:19,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:40:19,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:40:19,698 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:40:19,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 55 [2021-06-05 06:40:19,790 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 06:40:19,824 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:40:19,863 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:40:19,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 83 [2021-06-05 06:40:20,060 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 06:40:20,499 WARN L205 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 116 [2021-06-05 06:40:20,499 INFO L628 ElimStorePlain]: treesize reduction 230, result has 87.5 percent of original size [2021-06-05 06:40:20,806 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:40:20,806 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:56, output treesize:88 [2021-06-05 06:40:20,850 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:40:20,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147785306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:40:20,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:40:20,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 06:40:20,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545689224] [2021-06-05 06:40:20,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:40:20,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:40:20,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:40:20,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:40:20,851 INFO L87 Difference]: Start difference. First operand 1739 states and 5940 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:40:21,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:40:21,858 INFO L93 Difference]: Finished difference Result 3292 states and 10488 transitions. [2021-06-05 06:40:21,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 06:40:21,858 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 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 26 [2021-06-05 06:40:21,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:40:21,863 INFO L225 Difference]: With dead ends: 3292 [2021-06-05 06:40:21,863 INFO L226 Difference]: Without dead ends: 3248 [2021-06-05 06:40:21,863 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 763.8ms TimeCoverageRelationStatistics Valid=344, Invalid=1296, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 06:40:21,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3248 states. [2021-06-05 06:40:21,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3248 to 1786. [2021-06-05 06:40:21,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1786 states, 1785 states have (on average 3.4252100840336133) internal successors, (6114), 1785 states have internal predecessors, (6114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:40:21,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1786 states to 1786 states and 6114 transitions. [2021-06-05 06:40:21,892 INFO L78 Accepts]: Start accepts. Automaton has 1786 states and 6114 transitions. Word has length 26 [2021-06-05 06:40:21,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:40:21,892 INFO L482 AbstractCegarLoop]: Abstraction has 1786 states and 6114 transitions. [2021-06-05 06:40:21,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:40:21,892 INFO L276 IsEmpty]: Start isEmpty. Operand 1786 states and 6114 transitions. [2021-06-05 06:40:21,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:40:21,894 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:40:21,894 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:40:22,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5192,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:40:22,094 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:40:22,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:40:22,095 INFO L82 PathProgramCache]: Analyzing trace with hash -356659183, now seen corresponding path program 64 times [2021-06-05 06:40:22,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:40:22,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357627202] [2021-06-05 06:40:22,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:40:22,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:40:22,228 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:40:22,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:40:22,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357627202] [2021-06-05 06:40:22,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357627202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:40:22,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166211534] [2021-06-05 06:40:22,229 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:40:22,251 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:40:22,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:40:22,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:40:22,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:40:22,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:40:22,414 INFO L354 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2021-06-05 06:40:22,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 209 treesize of output 175 [2021-06-05 06:40:22,417 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:40:22,424 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:40:22,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:40:22,437 INFO L354 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2021-06-05 06:40:22,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 120 treesize of output 98 [2021-06-05 06:40:22,440 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:40:22,445 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:40:22,451 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:40:22,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-06-05 06:40:22,453 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:40:22,460 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:40:22,461 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:40:22,461 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:212, output treesize:3 [2021-06-05 06:40:22,474 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:40:22,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166211534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:40:22,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:40:22,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 06:40:22,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97858831] [2021-06-05 06:40:22,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:40:22,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:40:22,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:40:22,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:40:22,475 INFO L87 Difference]: Start difference. First operand 1786 states and 6114 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:40:23,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:40:23,300 INFO L93 Difference]: Finished difference Result 2484 states and 8179 transitions. [2021-06-05 06:40:23,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:40:23,301 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:40:23,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:40:23,304 INFO L225 Difference]: With dead ends: 2484 [2021-06-05 06:40:23,304 INFO L226 Difference]: Without dead ends: 2462 [2021-06-05 06:40:23,304 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 719.5ms TimeCoverageRelationStatistics Valid=278, Invalid=1128, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 06:40:23,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2462 states. [2021-06-05 06:40:23,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2462 to 1807. [2021-06-05 06:40:23,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1807 states, 1806 states have (on average 3.4186046511627906) internal successors, (6174), 1806 states have internal predecessors, (6174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:40:23,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1807 states to 1807 states and 6174 transitions. [2021-06-05 06:40:23,328 INFO L78 Accepts]: Start accepts. Automaton has 1807 states and 6174 transitions. Word has length 26 [2021-06-05 06:40:23,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:40:23,328 INFO L482 AbstractCegarLoop]: Abstraction has 1807 states and 6174 transitions. [2021-06-05 06:40:23,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:40:23,329 INFO L276 IsEmpty]: Start isEmpty. Operand 1807 states and 6174 transitions. [2021-06-05 06:40:23,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:40:23,331 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:40:23,331 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:40:23,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5363 [2021-06-05 06:40:23,531 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:40:23,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:40:23,531 INFO L82 PathProgramCache]: Analyzing trace with hash 568834683, now seen corresponding path program 65 times [2021-06-05 06:40:23,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:40:23,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539889104] [2021-06-05 06:40:23,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:40:23,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:40:23,664 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:40:23,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:40:23,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539889104] [2021-06-05 06:40:23,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539889104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:40:23,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556968363] [2021-06-05 06:40:23,665 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:40:23,688 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:40:23,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:40:23,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:40:23,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:40:25,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:40:25,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:40:25,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:40:25,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:40:25,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-06-05 06:40:25,778 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:40:25,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:40:25,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:40:25,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:40:25,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:40:25,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:40:25,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 06:40:25,790 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:40:25,796 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:40:25,801 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:40:25,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-05 06:40:25,803 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:40:25,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:40:25,811 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:40:25,812 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-05 06:40:25,828 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:40:25,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556968363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:40:25,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:40:25,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 06:40:25,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113261450] [2021-06-05 06:40:25,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:40:25,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:40:25,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:40:25,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=209, Unknown=2, NotChecked=0, Total=272 [2021-06-05 06:40:25,829 INFO L87 Difference]: Start difference. First operand 1807 states and 6174 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:40:29,047 WARN L205 SmtUtils]: Spent 1.09 s on a formula simplification that was a NOOP. DAG size: 50 [2021-06-05 06:40:30,513 WARN L205 SmtUtils]: Spent 1.37 s on a formula simplification that was a NOOP. DAG size: 55 [2021-06-05 06:40:32,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:40:32,055 INFO L93 Difference]: Finished difference Result 2669 states and 8779 transitions. [2021-06-05 06:40:32,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 06:40:32,055 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:40:32,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:40:32,058 INFO L225 Difference]: With dead ends: 2669 [2021-06-05 06:40:32,058 INFO L226 Difference]: Without dead ends: 2650 [2021-06-05 06:40:32,059 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 5119.3ms TimeCoverageRelationStatistics Valid=323, Invalid=1157, Unknown=2, NotChecked=0, Total=1482 [2021-06-05 06:40:32,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2650 states. [2021-06-05 06:40:32,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2650 to 1827. [2021-06-05 06:40:32,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1827 states, 1826 states have (on average 3.423329682365827) internal successors, (6251), 1826 states have internal predecessors, (6251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:40:32,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1827 states to 1827 states and 6251 transitions. [2021-06-05 06:40:32,081 INFO L78 Accepts]: Start accepts. Automaton has 1827 states and 6251 transitions. Word has length 26 [2021-06-05 06:40:32,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:40:32,081 INFO L482 AbstractCegarLoop]: Abstraction has 1827 states and 6251 transitions. [2021-06-05 06:40:32,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:40:32,081 INFO L276 IsEmpty]: Start isEmpty. Operand 1827 states and 6251 transitions. [2021-06-05 06:40:32,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:40:32,083 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:40:32,083 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:40:32,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5364 [2021-06-05 06:40:32,284 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:40:32,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:40:32,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1843182409, now seen corresponding path program 54 times [2021-06-05 06:40:32,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:40:32,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567801368] [2021-06-05 06:40:32,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:40:32,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:40:32,402 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:40:32,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:40:32,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567801368] [2021-06-05 06:40:32,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567801368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:40:32,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503738278] [2021-06-05 06:40:32,402 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:40:32,425 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:40:32,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:40:32,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:40:32,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:40:32,587 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:40:32,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 51 [2021-06-05 06:40:32,632 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:40:32,648 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:40:32,658 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:40:32,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 43 [2021-06-05 06:40:32,698 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:40:32,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:40:32,742 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:40:32,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 06:40:32,752 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 06:40:32,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:40:32,904 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:40:32,904 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:59, output treesize:110 [2021-06-05 06:40:33,006 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:40:33,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503738278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:40:33,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:40:33,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 06:40:33,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644508926] [2021-06-05 06:40:33,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:40:33,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:40:33,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:40:33,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:40:33,007 INFO L87 Difference]: Start difference. First operand 1827 states and 6251 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:40:34,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:40:34,743 INFO L93 Difference]: Finished difference Result 2809 states and 9183 transitions. [2021-06-05 06:40:34,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 06:40:34,743 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:40:34,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:40:34,747 INFO L225 Difference]: With dead ends: 2809 [2021-06-05 06:40:34,747 INFO L226 Difference]: Without dead ends: 2794 [2021-06-05 06:40:34,748 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 1146.7ms TimeCoverageRelationStatistics Valid=280, Invalid=1442, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 06:40:34,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2794 states. [2021-06-05 06:40:34,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2794 to 1827. [2021-06-05 06:40:34,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1827 states, 1826 states have (on average 3.41894852135816) internal successors, (6243), 1826 states have internal predecessors, (6243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:40:34,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1827 states to 1827 states and 6243 transitions. [2021-06-05 06:40:34,772 INFO L78 Accepts]: Start accepts. Automaton has 1827 states and 6243 transitions. Word has length 26 [2021-06-05 06:40:34,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:40:34,772 INFO L482 AbstractCegarLoop]: Abstraction has 1827 states and 6243 transitions. [2021-06-05 06:40:34,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:40:34,772 INFO L276 IsEmpty]: Start isEmpty. Operand 1827 states and 6243 transitions. [2021-06-05 06:40:34,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:40:34,774 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:40:34,774 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:40:34,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5365 [2021-06-05 06:40:34,976 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:40:34,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:40:34,976 INFO L82 PathProgramCache]: Analyzing trace with hash 761841983, now seen corresponding path program 55 times [2021-06-05 06:40:34,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:40:34,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012616002] [2021-06-05 06:40:34,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:40:34,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:40:35,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:40:35,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:40:35,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012616002] [2021-06-05 06:40:35,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012616002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:40:35,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583001898] [2021-06-05 06:40:35,100 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:40:35,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:40:35,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:40:35,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:40:35,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:40:35,260 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:40:35,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-06-05 06:40:35,278 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:40:35,294 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:40:35,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:40:35,301 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:40:35,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-05 06:40:35,317 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:40:35,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:40:35,349 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:40:35,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 06:40:35,353 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 06:40:35,395 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:40:35,407 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:40:35,407 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:54, output treesize:19 [2021-06-05 06:40:35,443 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:40:35,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583001898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:40:35,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:40:35,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 06:40:35,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838253241] [2021-06-05 06:40:35,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:40:35,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:40:35,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:40:35,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:40:35,444 INFO L87 Difference]: Start difference. First operand 1827 states and 6243 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:40:35,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:40:35,939 INFO L93 Difference]: Finished difference Result 2450 states and 8163 transitions. [2021-06-05 06:40:35,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 06:40:35,939 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:40:35,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:40:35,943 INFO L225 Difference]: With dead ends: 2450 [2021-06-05 06:40:35,943 INFO L226 Difference]: Without dead ends: 2425 [2021-06-05 06:40:35,943 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 438.6ms TimeCoverageRelationStatistics Valid=172, Invalid=640, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:40:35,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2425 states. [2021-06-05 06:40:35,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2425 to 1821. [2021-06-05 06:40:35,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1821 states, 1820 states have (on average 3.4164835164835163) internal successors, (6218), 1820 states have internal predecessors, (6218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:40:35,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1821 states to 1821 states and 6218 transitions. [2021-06-05 06:40:35,964 INFO L78 Accepts]: Start accepts. Automaton has 1821 states and 6218 transitions. Word has length 26 [2021-06-05 06:40:35,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:40:35,964 INFO L482 AbstractCegarLoop]: Abstraction has 1821 states and 6218 transitions. [2021-06-05 06:40:35,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:40:35,964 INFO L276 IsEmpty]: Start isEmpty. Operand 1821 states and 6218 transitions. [2021-06-05 06:40:35,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:40:35,966 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:40:35,967 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:40:36,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5425,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:40:36,167 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:40:36,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:40:36,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1900688067, now seen corresponding path program 56 times [2021-06-05 06:40:36,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:40:36,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137528731] [2021-06-05 06:40:36,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:40:36,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:40:36,281 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:40:36,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:40:36,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137528731] [2021-06-05 06:40:36,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137528731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:40:36,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229237287] [2021-06-05 06:40:36,282 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:40:36,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:40:36,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:40:36,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:40:36,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:40:36,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:40:36,431 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:40:36,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-06-05 06:40:36,447 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:40:36,456 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:40:36,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:40:36,463 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:40:36,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-05 06:40:36,479 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:40:36,493 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:40:36,510 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:40:36,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 06:40:36,514 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 06:40:36,553 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:40:36,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:40:36,563 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:49, output treesize:15 [2021-06-05 06:40:36,595 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:40:36,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229237287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:40:36,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:40:36,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 06:40:36,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317013697] [2021-06-05 06:40:36,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:40:36,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:40:36,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:40:36,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:40:36,595 INFO L87 Difference]: Start difference. First operand 1821 states and 6218 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:40:37,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:40:37,459 INFO L93 Difference]: Finished difference Result 2386 states and 7961 transitions. [2021-06-05 06:40:37,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 06:40:37,459 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:40:37,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:40:37,462 INFO L225 Difference]: With dead ends: 2386 [2021-06-05 06:40:37,463 INFO L226 Difference]: Without dead ends: 2371 [2021-06-05 06:40:37,463 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 644.6ms TimeCoverageRelationStatistics Valid=193, Invalid=1067, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 06:40:37,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2371 states. [2021-06-05 06:40:37,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2371 to 1810. [2021-06-05 06:40:37,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1810 states, 1809 states have (on average 3.4201216141514648) internal successors, (6187), 1809 states have internal predecessors, (6187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:40:37,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1810 states to 1810 states and 6187 transitions. [2021-06-05 06:40:37,485 INFO L78 Accepts]: Start accepts. Automaton has 1810 states and 6187 transitions. Word has length 26 [2021-06-05 06:40:37,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:40:37,485 INFO L482 AbstractCegarLoop]: Abstraction has 1810 states and 6187 transitions. [2021-06-05 06:40:37,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:40:37,485 INFO L276 IsEmpty]: Start isEmpty. Operand 1810 states and 6187 transitions. [2021-06-05 06:40:37,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:40:37,487 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:40:37,487 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:40:37,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5444,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:40:37,688 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:40:37,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:40:37,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1048584581, now seen corresponding path program 57 times [2021-06-05 06:40:37,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:40:37,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479457004] [2021-06-05 06:40:37,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:40:37,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:40:37,802 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:40:37,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:40:37,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479457004] [2021-06-05 06:40:37,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479457004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:40:37,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886350809] [2021-06-05 06:40:37,802 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:40:37,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:40:37,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:40:37,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:40:37,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:40:38,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:40:38,461 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:40:38,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 51 [2021-06-05 06:40:38,494 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:40:38,511 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:40:38,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:40:38,523 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:40:38,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 43 [2021-06-05 06:40:38,562 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:40:38,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:40:38,608 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:40:38,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 06:40:38,618 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 06:40:38,680 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:40:38,734 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:40:38,734 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:59, output treesize:219 [2021-06-05 06:40:38,855 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:40:38,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886350809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:40:38,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:40:38,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 06:40:38,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133168236] [2021-06-05 06:40:38,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:40:38,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:40:38,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:40:38,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:40:38,856 INFO L87 Difference]: Start difference. First operand 1810 states and 6187 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:41:00,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:41:00,745 INFO L93 Difference]: Finished difference Result 2381 states and 7969 transitions. [2021-06-05 06:41:00,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:41:00,745 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:41:00,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:41:00,748 INFO L225 Difference]: With dead ends: 2381 [2021-06-05 06:41:00,748 INFO L226 Difference]: Without dead ends: 2366 [2021-06-05 06:41:00,748 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 995.6ms TimeCoverageRelationStatistics Valid=166, Invalid=590, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:41:00,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2366 states. [2021-06-05 06:41:00,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2366 to 1804. [2021-06-05 06:41:00,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1804 states, 1803 states have (on average 3.4215196894065447) internal successors, (6169), 1803 states have internal predecessors, (6169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:41:00,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1804 states to 1804 states and 6169 transitions. [2021-06-05 06:41:00,770 INFO L78 Accepts]: Start accepts. Automaton has 1804 states and 6169 transitions. Word has length 26 [2021-06-05 06:41:00,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:41:00,771 INFO L482 AbstractCegarLoop]: Abstraction has 1804 states and 6169 transitions. [2021-06-05 06:41:00,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:41:00,771 INFO L276 IsEmpty]: Start isEmpty. Operand 1804 states and 6169 transitions. [2021-06-05 06:41:00,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:41:00,773 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:41:00,773 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:41:00,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5462,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:41:00,981 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:41:00,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:41:00,981 INFO L82 PathProgramCache]: Analyzing trace with hash 203762543, now seen corresponding path program 66 times [2021-06-05 06:41:00,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:41:00,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776018904] [2021-06-05 06:41:00,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:41:00,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:41:01,140 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:41:01,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:41:01,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776018904] [2021-06-05 06:41:01,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776018904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:41:01,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111848721] [2021-06-05 06:41:01,140 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:41:01,165 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:41:01,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:41:01,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:41:01,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:41:01,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:41:01,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:41:01,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:41:01,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:41:01,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-06-05 06:41:01,315 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:41:01,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:41:01,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:41:01,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:41:01,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:41:01,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:41:01,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 06:41:01,327 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:41:01,333 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:41:01,340 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:41:01,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-05 06:41:01,341 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:41:01,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:41:01,350 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:41:01,350 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-05 06:41:01,368 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:41:01,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111848721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:41:01,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:41:01,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 06:41:01,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107406830] [2021-06-05 06:41:01,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:41:01,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:41:01,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:41:01,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:41:01,369 INFO L87 Difference]: Start difference. First operand 1804 states and 6169 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:41:02,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:41:02,692 INFO L93 Difference]: Finished difference Result 2506 states and 8313 transitions. [2021-06-05 06:41:02,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 06:41:02,692 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:41:02,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:41:02,695 INFO L225 Difference]: With dead ends: 2506 [2021-06-05 06:41:02,695 INFO L226 Difference]: Without dead ends: 2484 [2021-06-05 06:41:02,696 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 1126.4ms TimeCoverageRelationStatistics Valid=432, Invalid=1730, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 06:41:02,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2484 states. [2021-06-05 06:41:02,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2484 to 1798. [2021-06-05 06:41:02,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1798 states, 1797 states have (on average 3.4201446855870894) internal successors, (6146), 1797 states have internal predecessors, (6146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:41:02,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1798 states to 1798 states and 6146 transitions. [2021-06-05 06:41:02,720 INFO L78 Accepts]: Start accepts. Automaton has 1798 states and 6146 transitions. Word has length 26 [2021-06-05 06:41:02,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:41:02,720 INFO L482 AbstractCegarLoop]: Abstraction has 1798 states and 6146 transitions. [2021-06-05 06:41:02,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:41:02,720 INFO L276 IsEmpty]: Start isEmpty. Operand 1798 states and 6146 transitions. [2021-06-05 06:41:02,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:41:02,722 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:41:02,722 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:41:02,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5517,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:41:02,923 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:41:02,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:41:02,923 INFO L82 PathProgramCache]: Analyzing trace with hash -82162369, now seen corresponding path program 67 times [2021-06-05 06:41:02,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:41:02,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167102314] [2021-06-05 06:41:02,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:41:02,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:41:03,076 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:41:03,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:41:03,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167102314] [2021-06-05 06:41:03,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167102314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:41:03,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511827532] [2021-06-05 06:41:03,076 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:41:03,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:41:03,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:41:03,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:41:04,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:41:04,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:41:04,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:41:04,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-06-05 06:41:04,005 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:41:04,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:41:04,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:41:04,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:41:04,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:41:04,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 06:41:04,018 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:41:04,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:41:04,030 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:41:04,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-05 06:41:04,031 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:41:04,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:41:04,041 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:41:04,041 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-05 06:41:04,058 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:41:04,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511827532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:41:04,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:41:04,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-05 06:41:04,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238653299] [2021-06-05 06:41:04,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:41:04,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:41:04,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:41:04,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=213, Unknown=1, NotChecked=0, Total=272 [2021-06-05 06:41:04,059 INFO L87 Difference]: Start difference. First operand 1798 states and 6146 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:41:05,706 WARN L205 SmtUtils]: Spent 889.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-06-05 06:41:05,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:41:05,750 INFO L93 Difference]: Finished difference Result 2433 states and 8050 transitions. [2021-06-05 06:41:05,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 06:41:05,751 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:41:05,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:41:05,754 INFO L225 Difference]: With dead ends: 2433 [2021-06-05 06:41:05,754 INFO L226 Difference]: Without dead ends: 2414 [2021-06-05 06:41:05,754 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 2369.1ms TimeCoverageRelationStatistics Valid=302, Invalid=1179, Unknown=1, NotChecked=0, Total=1482 [2021-06-05 06:41:05,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2414 states. [2021-06-05 06:41:05,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2414 to 1788. [2021-06-05 06:41:05,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1788 states, 1787 states have (on average 3.420817011751539) internal successors, (6113), 1787 states have internal predecessors, (6113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:41:05,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1788 states to 1788 states and 6113 transitions. [2021-06-05 06:41:05,775 INFO L78 Accepts]: Start accepts. Automaton has 1788 states and 6113 transitions. Word has length 26 [2021-06-05 06:41:05,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:41:05,775 INFO L482 AbstractCegarLoop]: Abstraction has 1788 states and 6113 transitions. [2021-06-05 06:41:05,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:41:05,775 INFO L276 IsEmpty]: Start isEmpty. Operand 1788 states and 6113 transitions. [2021-06-05 06:41:05,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:41:05,777 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:41:05,777 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:41:05,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5518,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:41:05,985 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:41:05,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:41:05,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1381576581, now seen corresponding path program 68 times [2021-06-05 06:41:05,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:41:05,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300891195] [2021-06-05 06:41:05,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:41:05,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:41:06,131 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:41:06,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:41:06,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300891195] [2021-06-05 06:41:06,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300891195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:41:06,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847861319] [2021-06-05 06:41:06,132 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:41:06,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:41:06,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:41:06,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:41:06,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:41:10,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:41:10,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:41:10,331 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:41:10,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 65 [2021-06-05 06:41:10,410 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 06:41:10,430 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:41:10,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:41:10,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:41:10,446 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:41:10,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 55 [2021-06-05 06:41:10,521 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 06:41:10,552 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:41:10,588 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:41:10,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 83 [2021-06-05 06:41:10,825 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 06:41:11,494 WARN L205 SmtUtils]: Spent 667.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 111 [2021-06-05 06:41:11,494 INFO L628 ElimStorePlain]: treesize reduction 862, result has 54.9 percent of original size [2021-06-05 06:41:11,756 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:41:11,756 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:56, output treesize:78 [2021-06-05 06:41:11,793 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:41:11,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847861319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:41:11,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:41:11,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 06:41:11,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877656401] [2021-06-05 06:41:11,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:41:11,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:41:11,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:41:11,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=275, Unknown=2, NotChecked=0, Total=342 [2021-06-05 06:41:11,794 INFO L87 Difference]: Start difference. First operand 1788 states and 6113 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:41:12,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:41:12,608 INFO L93 Difference]: Finished difference Result 2410 states and 8027 transitions. [2021-06-05 06:41:12,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 06:41:12,609 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:41:12,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:41:12,612 INFO L225 Difference]: With dead ends: 2410 [2021-06-05 06:41:12,612 INFO L226 Difference]: Without dead ends: 2395 [2021-06-05 06:41:12,612 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 4704.1ms TimeCoverageRelationStatistics Valid=238, Invalid=1092, Unknown=2, NotChecked=0, Total=1332 [2021-06-05 06:41:12,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2395 states. [2021-06-05 06:41:12,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2395 to 1793. [2021-06-05 06:41:12,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1793 states, 1792 states have (on average 3.42578125) internal successors, (6139), 1792 states have internal predecessors, (6139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:41:12,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1793 states to 1793 states and 6139 transitions. [2021-06-05 06:41:12,643 INFO L78 Accepts]: Start accepts. Automaton has 1793 states and 6139 transitions. Word has length 26 [2021-06-05 06:41:12,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:41:12,643 INFO L482 AbstractCegarLoop]: Abstraction has 1793 states and 6139 transitions. [2021-06-05 06:41:12,643 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:41:12,643 INFO L276 IsEmpty]: Start isEmpty. Operand 1793 states and 6139 transitions. [2021-06-05 06:41:12,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:41:12,645 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:41:12,645 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:41:12,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5519 [2021-06-05 06:41:12,847 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:41:12,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:41:12,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1841060543, now seen corresponding path program 69 times [2021-06-05 06:41:12,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:41:12,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428867061] [2021-06-05 06:41:12,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:41:12,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:41:12,961 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:41:12,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:41:12,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428867061] [2021-06-05 06:41:12,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428867061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:41:12,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505582552] [2021-06-05 06:41:12,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:41:12,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:41:12,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:41:12,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:41:12,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:41:14,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:41:14,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:41:14,906 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:41:14,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 65 [2021-06-05 06:41:14,987 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 06:41:15,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:41:15,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:41:15,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:41:15,023 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:41:15,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 55 [2021-06-05 06:41:15,098 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 06:41:15,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:41:15,166 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:41:15,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 83 [2021-06-05 06:41:15,434 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 06:41:15,950 WARN L205 SmtUtils]: Spent 515.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 122 [2021-06-05 06:41:15,950 INFO L628 ElimStorePlain]: treesize reduction 708, result has 70.2 percent of original size [2021-06-05 06:41:16,337 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:41:16,337 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:56, output treesize:43 [2021-06-05 06:41:16,386 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:41:16,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505582552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:41:16,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:41:16,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 06:41:16,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720004300] [2021-06-05 06:41:16,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:41:16,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:41:16,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:41:16,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=187, Unknown=1, NotChecked=0, Total=240 [2021-06-05 06:41:16,387 INFO L87 Difference]: Start difference. First operand 1793 states and 6139 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:41:35,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:41:35,333 INFO L93 Difference]: Finished difference Result 2526 states and 8347 transitions. [2021-06-05 06:41:35,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 06:41:35,333 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) 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 26 [2021-06-05 06:41:35,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:41:35,337 INFO L225 Difference]: With dead ends: 2526 [2021-06-05 06:41:35,337 INFO L226 Difference]: Without dead ends: 2496 [2021-06-05 06:41:35,338 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 2316.2ms TimeCoverageRelationStatistics Valid=206, Invalid=849, Unknown=1, NotChecked=0, Total=1056 [2021-06-05 06:41:35,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2496 states. [2021-06-05 06:41:35,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2496 to 1788. [2021-06-05 06:41:35,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1788 states, 1787 states have (on average 3.4191382204812535) internal successors, (6110), 1787 states have internal predecessors, (6110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:41:35,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1788 states to 1788 states and 6110 transitions. [2021-06-05 06:41:35,360 INFO L78 Accepts]: Start accepts. Automaton has 1788 states and 6110 transitions. Word has length 26 [2021-06-05 06:41:35,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:41:35,360 INFO L482 AbstractCegarLoop]: Abstraction has 1788 states and 6110 transitions. [2021-06-05 06:41:35,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:41:35,360 INFO L276 IsEmpty]: Start isEmpty. Operand 1788 states and 6110 transitions. [2021-06-05 06:41:35,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:41:35,362 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:41:35,362 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:41:35,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5662 [2021-06-05 06:41:35,562 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:41:35,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:41:35,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1705681877, now seen corresponding path program 58 times [2021-06-05 06:41:35,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:41:35,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075349281] [2021-06-05 06:41:35,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:41:35,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:41:35,607 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:41:35,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:41:35,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075349281] [2021-06-05 06:41:35,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075349281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:41:35,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734148891] [2021-06-05 06:41:35,608 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:41:35,635 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:41:35,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:41:35,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:41:35,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:41:35,730 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:41:35,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734148891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:41:35,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:41:35,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 06:41:35,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804420301] [2021-06-05 06:41:35,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:41:35,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:41:35,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:41:35,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:41:35,731 INFO L87 Difference]: Start difference. First operand 1788 states and 6110 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:41:36,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:41:36,730 INFO L93 Difference]: Finished difference Result 4735 states and 14630 transitions. [2021-06-05 06:41:36,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 06:41:36,731 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:41:36,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:41:36,737 INFO L225 Difference]: With dead ends: 4735 [2021-06-05 06:41:36,738 INFO L226 Difference]: Without dead ends: 4735 [2021-06-05 06:41:36,738 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 566.7ms TimeCoverageRelationStatistics Valid=802, Invalid=2858, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 06:41:36,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4735 states. [2021-06-05 06:41:36,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4735 to 1981. [2021-06-05 06:41:36,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1981 states, 1980 states have (on average 3.4752525252525253) internal successors, (6881), 1980 states have internal predecessors, (6881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:41:36,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1981 states to 1981 states and 6881 transitions. [2021-06-05 06:41:36,776 INFO L78 Accepts]: Start accepts. Automaton has 1981 states and 6881 transitions. Word has length 28 [2021-06-05 06:41:36,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:41:36,776 INFO L482 AbstractCegarLoop]: Abstraction has 1981 states and 6881 transitions. [2021-06-05 06:41:36,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:41:36,776 INFO L276 IsEmpty]: Start isEmpty. Operand 1981 states and 6881 transitions. [2021-06-05 06:41:36,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:41:36,779 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:41:36,779 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:41:36,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5784 [2021-06-05 06:41:36,979 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:41:36,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:41:36,980 INFO L82 PathProgramCache]: Analyzing trace with hash 729363033, now seen corresponding path program 59 times [2021-06-05 06:41:36,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:41:36,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883010542] [2021-06-05 06:41:36,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:41:36,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:41:37,019 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:41:37,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:41:37,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883010542] [2021-06-05 06:41:37,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883010542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:41:37,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878450648] [2021-06-05 06:41:37,020 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:41:37,063 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:41:37,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:41:37,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:41:37,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:41:37,187 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:41:37,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878450648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:41:37,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:41:37,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 06:41:37,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949025531] [2021-06-05 06:41:37,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:41:37,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:41:37,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:41:37,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:41:37,189 INFO L87 Difference]: Start difference. First operand 1981 states and 6881 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:41:38,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:41:38,424 INFO L93 Difference]: Finished difference Result 6281 states and 19109 transitions. [2021-06-05 06:41:38,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 06:41:38,424 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:41:38,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:41:38,433 INFO L225 Difference]: With dead ends: 6281 [2021-06-05 06:41:38,433 INFO L226 Difference]: Without dead ends: 6281 [2021-06-05 06:41:38,434 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2023 ImplicationChecksByTransitivity, 744.7ms TimeCoverageRelationStatistics Valid=1110, Invalid=4590, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 06:41:38,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6281 states. [2021-06-05 06:41:38,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6281 to 1992. [2021-06-05 06:41:38,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1992 states, 1991 states have (on average 3.4831742842792566) internal successors, (6935), 1991 states have internal predecessors, (6935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:41:38,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1992 states to 1992 states and 6935 transitions. [2021-06-05 06:41:38,484 INFO L78 Accepts]: Start accepts. Automaton has 1992 states and 6935 transitions. Word has length 28 [2021-06-05 06:41:38,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:41:38,484 INFO L482 AbstractCegarLoop]: Abstraction has 1992 states and 6935 transitions. [2021-06-05 06:41:38,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:41:38,484 INFO L276 IsEmpty]: Start isEmpty. Operand 1992 states and 6935 transitions. [2021-06-05 06:41:38,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:41:38,486 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:41:38,486 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:41:38,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5785,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:41:38,687 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:41:38,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:41:38,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1296315113, now seen corresponding path program 60 times [2021-06-05 06:41:38,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:41:38,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365956312] [2021-06-05 06:41:38,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:41:38,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:41:38,735 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:41:38,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:41:38,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365956312] [2021-06-05 06:41:38,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365956312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:41:38,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522586913] [2021-06-05 06:41:38,736 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:41:38,759 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:41:38,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:41:38,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:41:38,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:41:38,860 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:41:38,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522586913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:41:38,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:41:38,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 06:41:38,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404342467] [2021-06-05 06:41:38,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:41:38,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:41:38,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:41:38,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:41:38,861 INFO L87 Difference]: Start difference. First operand 1992 states and 6935 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:41:40,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:41:40,029 INFO L93 Difference]: Finished difference Result 5674 states and 17641 transitions. [2021-06-05 06:41:40,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 06:41:40,030 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:41:40,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:41:40,037 INFO L225 Difference]: With dead ends: 5674 [2021-06-05 06:41:40,038 INFO L226 Difference]: Without dead ends: 5674 [2021-06-05 06:41:40,038 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2006 ImplicationChecksByTransitivity, 703.6ms TimeCoverageRelationStatistics Valid=1099, Invalid=4451, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 06:41:40,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5674 states. [2021-06-05 06:41:40,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5674 to 1940. [2021-06-05 06:41:40,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1940 states, 1939 states have (on average 3.4569365652398143) internal successors, (6703), 1939 states have internal predecessors, (6703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:41:40,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1940 states to 1940 states and 6703 transitions. [2021-06-05 06:41:40,088 INFO L78 Accepts]: Start accepts. Automaton has 1940 states and 6703 transitions. Word has length 28 [2021-06-05 06:41:40,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:41:40,088 INFO L482 AbstractCegarLoop]: Abstraction has 1940 states and 6703 transitions. [2021-06-05 06:41:40,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:41:40,088 INFO L276 IsEmpty]: Start isEmpty. Operand 1940 states and 6703 transitions. [2021-06-05 06:41:40,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:41:40,090 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:41:40,090 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:41:40,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5786,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:41:40,305 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:41:40,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:41:40,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1816623861, now seen corresponding path program 61 times [2021-06-05 06:41:40,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:41:40,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092646294] [2021-06-05 06:41:40,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:41:40,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:41:40,344 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:41:40,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:41:40,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092646294] [2021-06-05 06:41:40,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092646294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:41:40,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388445910] [2021-06-05 06:41:40,344 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:41:40,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:41:40,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:41:40,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:41:40,461 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:41:40,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388445910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:41:40,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:41:40,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 06:41:40,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969404608] [2021-06-05 06:41:40,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:41:40,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:41:40,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:41:40,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:41:40,461 INFO L87 Difference]: Start difference. First operand 1940 states and 6703 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:41:41,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:41:41,506 INFO L93 Difference]: Finished difference Result 4821 states and 14797 transitions. [2021-06-05 06:41:41,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 06:41:41,506 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:41:41,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:41:41,512 INFO L225 Difference]: With dead ends: 4821 [2021-06-05 06:41:41,512 INFO L226 Difference]: Without dead ends: 4821 [2021-06-05 06:41:41,513 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1541 ImplicationChecksByTransitivity, 636.3ms TimeCoverageRelationStatistics Valid=904, Invalid=3652, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 06:41:41,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4821 states. [2021-06-05 06:41:41,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4821 to 1950. [2021-06-05 06:41:41,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1950 states, 1949 states have (on average 3.452539763981529) internal successors, (6729), 1949 states have internal predecessors, (6729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:41:41,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1950 states to 1950 states and 6729 transitions. [2021-06-05 06:41:41,549 INFO L78 Accepts]: Start accepts. Automaton has 1950 states and 6729 transitions. Word has length 28 [2021-06-05 06:41:41,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:41:41,549 INFO L482 AbstractCegarLoop]: Abstraction has 1950 states and 6729 transitions. [2021-06-05 06:41:41,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:41:41,549 INFO L276 IsEmpty]: Start isEmpty. Operand 1950 states and 6729 transitions. [2021-06-05 06:41:41,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:41:41,551 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:41:41,551 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:41:41,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5787,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:41:41,752 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:41:41,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:41:41,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1268713169, now seen corresponding path program 70 times [2021-06-05 06:41:41,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:41:41,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655830329] [2021-06-05 06:41:41,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:41:41,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:41:41,793 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:41:41,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:41:41,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655830329] [2021-06-05 06:41:41,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655830329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:41:41,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579017964] [2021-06-05 06:41:41,793 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:41:41,816 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:41:41,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:41:41,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:41:41,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:41:41,914 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:41:41,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579017964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:41:41,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:41:41,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 06:41:41,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268593465] [2021-06-05 06:41:41,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:41:41,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:41:41,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:41:41,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:41:41,915 INFO L87 Difference]: Start difference. First operand 1950 states and 6729 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:41:42,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:41:42,487 INFO L93 Difference]: Finished difference Result 4242 states and 13200 transitions. [2021-06-05 06:41:42,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 06:41:42,487 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:41:42,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:41:42,493 INFO L225 Difference]: With dead ends: 4242 [2021-06-05 06:41:42,493 INFO L226 Difference]: Without dead ends: 4242 [2021-06-05 06:41:42,493 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 313.4ms TimeCoverageRelationStatistics Valid=383, Invalid=1339, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 06:41:42,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4242 states. [2021-06-05 06:41:42,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4242 to 2006. [2021-06-05 06:41:42,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2006 states, 2005 states have (on average 3.437406483790524) internal successors, (6892), 2005 states have internal predecessors, (6892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:41:42,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2006 states to 2006 states and 6892 transitions. [2021-06-05 06:41:42,531 INFO L78 Accepts]: Start accepts. Automaton has 2006 states and 6892 transitions. Word has length 28 [2021-06-05 06:41:42,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:41:42,531 INFO L482 AbstractCegarLoop]: Abstraction has 2006 states and 6892 transitions. [2021-06-05 06:41:42,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:41:42,531 INFO L276 IsEmpty]: Start isEmpty. Operand 2006 states and 6892 transitions. [2021-06-05 06:41:42,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:41:42,534 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:41:42,534 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:41:42,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5788,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:41:42,734 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:41:42,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:41:42,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1127344537, now seen corresponding path program 62 times [2021-06-05 06:41:42,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:41:42,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806252755] [2021-06-05 06:41:42,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:41:42,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:41:42,761 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:41:42,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:41:42,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806252755] [2021-06-05 06:41:42,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806252755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:41:42,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176907108] [2021-06-05 06:41:42,761 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:41:42,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:41:42,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:41:42,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:41:42,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:41:42,862 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:41:42,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176907108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:41:42,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:41:42,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 06:41:42,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509660006] [2021-06-05 06:41:42,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:41:42,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:41:42,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:41:42,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:41:42,863 INFO L87 Difference]: Start difference. First operand 2006 states and 6892 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:41:43,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:41:43,052 INFO L93 Difference]: Finished difference Result 3508 states and 11418 transitions. [2021-06-05 06:41:43,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:41:43,052 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:41:43,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:41:43,059 INFO L225 Difference]: With dead ends: 3508 [2021-06-05 06:41:43,059 INFO L226 Difference]: Without dead ends: 3490 [2021-06-05 06:41:43,059 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 108.2ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:41:43,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3490 states. [2021-06-05 06:41:43,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3490 to 2393. [2021-06-05 06:41:43,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2393 states, 2392 states have (on average 3.5100334448160537) internal successors, (8396), 2392 states have internal predecessors, (8396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:41:43,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2393 states to 2393 states and 8396 transitions. [2021-06-05 06:41:43,095 INFO L78 Accepts]: Start accepts. Automaton has 2393 states and 8396 transitions. Word has length 28 [2021-06-05 06:41:43,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:41:43,095 INFO L482 AbstractCegarLoop]: Abstraction has 2393 states and 8396 transitions. [2021-06-05 06:41:43,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:41:43,095 INFO L276 IsEmpty]: Start isEmpty. Operand 2393 states and 8396 transitions. [2021-06-05 06:41:43,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:41:43,098 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:41:43,098 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:41:43,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5789 [2021-06-05 06:41:43,313 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:41:43,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:41:43,313 INFO L82 PathProgramCache]: Analyzing trace with hash 690375829, now seen corresponding path program 63 times [2021-06-05 06:41:43,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:41:43,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364411041] [2021-06-05 06:41:43,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:41:43,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:41:43,345 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:41:43,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:41:43,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364411041] [2021-06-05 06:41:43,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364411041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:41:43,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327175835] [2021-06-05 06:41:43,345 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:41:43,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:41:43,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:41:43,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:41:43,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:41:43,444 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:41:43,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327175835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:41:43,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:41:43,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 06:41:43,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297985516] [2021-06-05 06:41:43,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:41:43,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:41:43,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:41:43,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:41:43,444 INFO L87 Difference]: Start difference. First operand 2393 states and 8396 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:41:44,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:41:44,032 INFO L93 Difference]: Finished difference Result 4165 states and 13279 transitions. [2021-06-05 06:41:44,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 06:41:44,033 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:41:44,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:41:44,038 INFO L225 Difference]: With dead ends: 4165 [2021-06-05 06:41:44,039 INFO L226 Difference]: Without dead ends: 4118 [2021-06-05 06:41:44,039 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 348.0ms TimeCoverageRelationStatistics Valid=515, Invalid=1465, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 06:41:44,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4118 states. [2021-06-05 06:41:44,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4118 to 2561. [2021-06-05 06:41:44,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2561 states, 2560 states have (on average 3.53046875) internal successors, (9038), 2560 states have internal predecessors, (9038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:41:44,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2561 states to 2561 states and 9038 transitions. [2021-06-05 06:41:44,082 INFO L78 Accepts]: Start accepts. Automaton has 2561 states and 9038 transitions. Word has length 28 [2021-06-05 06:41:44,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:41:44,082 INFO L482 AbstractCegarLoop]: Abstraction has 2561 states and 9038 transitions. [2021-06-05 06:41:44,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:41:44,082 INFO L276 IsEmpty]: Start isEmpty. Operand 2561 states and 9038 transitions. [2021-06-05 06:41:44,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:41:44,085 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:41:44,085 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:41:44,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5790 [2021-06-05 06:41:44,286 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:41:44,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:41:44,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1670242449, now seen corresponding path program 71 times [2021-06-05 06:41:44,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:41:44,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317931795] [2021-06-05 06:41:44,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:41:44,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:41:44,324 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:41:44,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:41:44,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317931795] [2021-06-05 06:41:44,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317931795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:41:44,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745744028] [2021-06-05 06:41:44,325 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:41:44,348 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:41:44,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:41:44,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:41:44,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:41:44,441 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:41:44,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745744028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:41:44,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:41:44,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 06:41:44,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454270093] [2021-06-05 06:41:44,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:41:44,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:41:44,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:41:44,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:41:44,442 INFO L87 Difference]: Start difference. First operand 2561 states and 9038 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:41:44,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:41:44,840 INFO L93 Difference]: Finished difference Result 5014 states and 16655 transitions. [2021-06-05 06:41:44,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 06:41:44,841 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:41:44,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:41:44,848 INFO L225 Difference]: With dead ends: 5014 [2021-06-05 06:41:44,848 INFO L226 Difference]: Without dead ends: 4927 [2021-06-05 06:41:44,848 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 309.2ms TimeCoverageRelationStatistics Valid=380, Invalid=1102, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 06:41:44,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4927 states. [2021-06-05 06:41:44,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4927 to 3219. [2021-06-05 06:41:44,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3219 states, 3218 states have (on average 3.550652579241765) internal successors, (11426), 3218 states have internal predecessors, (11426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:41:44,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3219 states to 3219 states and 11426 transitions. [2021-06-05 06:41:44,906 INFO L78 Accepts]: Start accepts. Automaton has 3219 states and 11426 transitions. Word has length 28 [2021-06-05 06:41:44,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:41:44,906 INFO L482 AbstractCegarLoop]: Abstraction has 3219 states and 11426 transitions. [2021-06-05 06:41:44,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:41:44,906 INFO L276 IsEmpty]: Start isEmpty. Operand 3219 states and 11426 transitions. [2021-06-05 06:41:44,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:41:44,910 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:41:44,910 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:41:45,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5791,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:41:45,111 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:41:45,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:41:45,111 INFO L82 PathProgramCache]: Analyzing trace with hash -2068501991, now seen corresponding path program 64 times [2021-06-05 06:41:45,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:41:45,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030332610] [2021-06-05 06:41:45,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:41:45,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:41:45,143 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:41:45,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:41:45,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030332610] [2021-06-05 06:41:45,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030332610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:41:45,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134397481] [2021-06-05 06:41:45,143 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:41:45,166 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:41:45,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:41:45,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:41:45,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:41:45,258 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:41:45,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134397481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:41:45,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:41:45,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 06:41:45,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537321131] [2021-06-05 06:41:45,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:41:45,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:41:45,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:41:45,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:41:45,259 INFO L87 Difference]: Start difference. First operand 3219 states and 11426 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:41:45,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:41:45,928 INFO L93 Difference]: Finished difference Result 5456 states and 17327 transitions. [2021-06-05 06:41:45,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 06:41:45,929 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:41:45,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:41:45,936 INFO L225 Difference]: With dead ends: 5456 [2021-06-05 06:41:45,937 INFO L226 Difference]: Without dead ends: 5430 [2021-06-05 06:41:45,937 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 424.1ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 06:41:45,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5430 states. [2021-06-05 06:41:45,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5430 to 3237. [2021-06-05 06:41:45,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3237 states, 3236 states have (on average 3.5559332509270702) internal successors, (11507), 3236 states have internal predecessors, (11507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:41:45,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3237 states to 3237 states and 11507 transitions. [2021-06-05 06:41:45,998 INFO L78 Accepts]: Start accepts. Automaton has 3237 states and 11507 transitions. Word has length 28 [2021-06-05 06:41:45,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:41:45,998 INFO L482 AbstractCegarLoop]: Abstraction has 3237 states and 11507 transitions. [2021-06-05 06:41:45,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:41:45,998 INFO L276 IsEmpty]: Start isEmpty. Operand 3237 states and 11507 transitions. [2021-06-05 06:41:46,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:41:46,002 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:41:46,002 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:41:46,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5792 [2021-06-05 06:41:46,203 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:41:46,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:41:46,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1396089209, now seen corresponding path program 65 times [2021-06-05 06:41:46,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:41:46,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198330888] [2021-06-05 06:41:46,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:41:46,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:41:46,234 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:41:46,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:41:46,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198330888] [2021-06-05 06:41:46,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198330888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:41:46,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543772064] [2021-06-05 06:41:46,235 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:41:46,258 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:41:46,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:41:46,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:41:46,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:41:46,348 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:41:46,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543772064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:41:46,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:41:46,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 06:41:46,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351638315] [2021-06-05 06:41:46,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:41:46,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:41:46,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:41:46,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:41:46,349 INFO L87 Difference]: Start difference. First operand 3237 states and 11507 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:41:47,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:41:47,001 INFO L93 Difference]: Finished difference Result 5511 states and 17519 transitions. [2021-06-05 06:41:47,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 06:41:47,001 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:41:47,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:41:47,009 INFO L225 Difference]: With dead ends: 5511 [2021-06-05 06:41:47,009 INFO L226 Difference]: Without dead ends: 5480 [2021-06-05 06:41:47,009 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 435.3ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 06:41:47,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5480 states. [2021-06-05 06:41:47,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5480 to 3230. [2021-06-05 06:41:47,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3230 states, 3229 states have (on average 3.562403220811397) internal successors, (11503), 3229 states have internal predecessors, (11503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:41:47,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3230 states to 3230 states and 11503 transitions. [2021-06-05 06:41:47,068 INFO L78 Accepts]: Start accepts. Automaton has 3230 states and 11503 transitions. Word has length 28 [2021-06-05 06:41:47,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:41:47,068 INFO L482 AbstractCegarLoop]: Abstraction has 3230 states and 11503 transitions. [2021-06-05 06:41:47,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:41:47,068 INFO L276 IsEmpty]: Start isEmpty. Operand 3230 states and 11503 transitions. [2021-06-05 06:41:47,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:41:47,072 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:41:47,072 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:41:47,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5793 [2021-06-05 06:41:47,272 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:41:47,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:41:47,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1850079165, now seen corresponding path program 66 times [2021-06-05 06:41:47,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:41:47,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425840154] [2021-06-05 06:41:47,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:41:47,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:41:47,303 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:41:47,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:41:47,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425840154] [2021-06-05 06:41:47,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425840154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:41:47,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203623360] [2021-06-05 06:41:47,304 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:41:47,327 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:41:47,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:41:47,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:41:47,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:41:47,391 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:41:47,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203623360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:41:47,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:41:47,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 06:41:47,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496107663] [2021-06-05 06:41:47,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:41:47,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:41:47,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:41:47,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:41:47,392 INFO L87 Difference]: Start difference. First operand 3230 states and 11503 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:41:47,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:41:47,926 INFO L93 Difference]: Finished difference Result 6692 states and 21656 transitions. [2021-06-05 06:41:47,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 06:41:47,926 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:41:47,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:41:47,936 INFO L225 Difference]: With dead ends: 6692 [2021-06-05 06:41:47,937 INFO L226 Difference]: Without dead ends: 6645 [2021-06-05 06:41:47,937 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 300.0ms TimeCoverageRelationStatistics Valid=455, Invalid=1267, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 06:41:47,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6645 states. [2021-06-05 06:41:48,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6645 to 3393. [2021-06-05 06:41:48,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3393 states, 3392 states have (on average 3.608490566037736) internal successors, (12240), 3392 states have internal predecessors, (12240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:41:48,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3393 states to 3393 states and 12240 transitions. [2021-06-05 06:41:48,011 INFO L78 Accepts]: Start accepts. Automaton has 3393 states and 12240 transitions. Word has length 28 [2021-06-05 06:41:48,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:41:48,011 INFO L482 AbstractCegarLoop]: Abstraction has 3393 states and 12240 transitions. [2021-06-05 06:41:48,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:41:48,011 INFO L276 IsEmpty]: Start isEmpty. Operand 3393 states and 12240 transitions. [2021-06-05 06:41:48,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:41:48,016 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:41:48,016 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:41:48,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5794 [2021-06-05 06:41:48,216 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:41:48,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:41:48,217 INFO L82 PathProgramCache]: Analyzing trace with hash -361109379, now seen corresponding path program 67 times [2021-06-05 06:41:48,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:41:48,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002668988] [2021-06-05 06:41:48,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:41:48,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:41:48,242 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:41:48,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:41:48,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002668988] [2021-06-05 06:41:48,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002668988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:41:48,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111593460] [2021-06-05 06:41:48,242 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:41:48,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:41:48,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:41:48,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:41:48,321 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:41:48,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111593460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:41:48,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:41:48,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 06:41:48,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828876771] [2021-06-05 06:41:48,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 06:41:48,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:41:48,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 06:41:48,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 06:41:48,322 INFO L87 Difference]: Start difference. First operand 3393 states and 12240 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:41:48,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:41:48,488 INFO L93 Difference]: Finished difference Result 5080 states and 16859 transitions. [2021-06-05 06:41:48,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:41:48,489 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:41:48,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:41:48,496 INFO L225 Difference]: With dead ends: 5080 [2021-06-05 06:41:48,496 INFO L226 Difference]: Without dead ends: 5080 [2021-06-05 06:41:48,496 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 116.4ms TimeCoverageRelationStatistics Valid=132, Invalid=210, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:41:48,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5080 states. [2021-06-05 06:41:48,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5080 to 3225. [2021-06-05 06:41:48,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3225 states, 3224 states have (on average 3.5688585607940446) internal successors, (11506), 3224 states have internal predecessors, (11506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:41:48,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3225 states to 3225 states and 11506 transitions. [2021-06-05 06:41:48,551 INFO L78 Accepts]: Start accepts. Automaton has 3225 states and 11506 transitions. Word has length 28 [2021-06-05 06:41:48,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:41:48,551 INFO L482 AbstractCegarLoop]: Abstraction has 3225 states and 11506 transitions. [2021-06-05 06:41:48,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:41:48,551 INFO L276 IsEmpty]: Start isEmpty. Operand 3225 states and 11506 transitions. [2021-06-05 06:41:48,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:41:48,555 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:41:48,555 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:41:48,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5795 [2021-06-05 06:41:48,756 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:41:48,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:41:48,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1707790945, now seen corresponding path program 68 times [2021-06-05 06:41:48,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:41:48,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927244672] [2021-06-05 06:41:48,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:41:48,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:41:48,801 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:41:48,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:41:48,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927244672] [2021-06-05 06:41:48,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927244672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:41:48,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517502639] [2021-06-05 06:41:48,801 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:41:48,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:41:48,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:41:48,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:41:48,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:41:48,894 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:41:48,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517502639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:41:48,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:41:48,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 06:41:48,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401166986] [2021-06-05 06:41:48,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:41:48,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:41:48,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:41:48,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:41:48,895 INFO L87 Difference]: Start difference. First operand 3225 states and 11506 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:41:49,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:41:49,531 INFO L93 Difference]: Finished difference Result 7140 states and 22841 transitions. [2021-06-05 06:41:49,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 06:41:49,531 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:41:49,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:41:49,542 INFO L225 Difference]: With dead ends: 7140 [2021-06-05 06:41:49,542 INFO L226 Difference]: Without dead ends: 7140 [2021-06-05 06:41:49,542 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 366.8ms TimeCoverageRelationStatistics Valid=552, Invalid=1800, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 06:41:49,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7140 states. [2021-06-05 06:41:49,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7140 to 3255. [2021-06-05 06:41:49,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3255 states, 3254 states have (on average 3.5682237246465887) internal successors, (11611), 3254 states have internal predecessors, (11611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:41:49,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3255 states to 3255 states and 11611 transitions. [2021-06-05 06:41:49,618 INFO L78 Accepts]: Start accepts. Automaton has 3255 states and 11611 transitions. Word has length 28 [2021-06-05 06:41:49,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:41:49,618 INFO L482 AbstractCegarLoop]: Abstraction has 3255 states and 11611 transitions. [2021-06-05 06:41:49,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:41:49,618 INFO L276 IsEmpty]: Start isEmpty. Operand 3255 states and 11611 transitions. [2021-06-05 06:41:49,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:41:49,622 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:41:49,622 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:41:49,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5796,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:41:49,825 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:41:49,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:41:49,825 INFO L82 PathProgramCache]: Analyzing trace with hash -922876851, now seen corresponding path program 69 times [2021-06-05 06:41:49,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:41:49,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295878819] [2021-06-05 06:41:49,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:41:49,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:41:49,857 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:41:49,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:41:49,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295878819] [2021-06-05 06:41:49,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295878819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:41:49,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207489042] [2021-06-05 06:41:49,857 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:41:49,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 06:41:49,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:41:49,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:41:49,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:41:49,951 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:41:49,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207489042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:41:49,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:41:49,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 06:41:49,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73141130] [2021-06-05 06:41:49,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:41:49,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:41:49,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:41:49,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:41:49,952 INFO L87 Difference]: Start difference. First operand 3255 states and 11611 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:41:50,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:41:50,714 INFO L93 Difference]: Finished difference Result 7432 states and 23809 transitions. [2021-06-05 06:41:50,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 06:41:50,714 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:41:50,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:41:50,725 INFO L225 Difference]: With dead ends: 7432 [2021-06-05 06:41:50,725 INFO L226 Difference]: Without dead ends: 7432 [2021-06-05 06:41:50,726 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 407.4ms TimeCoverageRelationStatistics Valid=634, Invalid=2336, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 06:41:50,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7432 states. [2021-06-05 06:41:50,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7432 to 3385. [2021-06-05 06:41:50,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3385 states, 3384 states have (on average 3.551418439716312) internal successors, (12018), 3384 states have internal predecessors, (12018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:41:50,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3385 states to 3385 states and 12018 transitions. [2021-06-05 06:41:50,802 INFO L78 Accepts]: Start accepts. Automaton has 3385 states and 12018 transitions. Word has length 28 [2021-06-05 06:41:50,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:41:50,802 INFO L482 AbstractCegarLoop]: Abstraction has 3385 states and 12018 transitions. [2021-06-05 06:41:50,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:41:50,802 INFO L276 IsEmpty]: Start isEmpty. Operand 3385 states and 12018 transitions. [2021-06-05 06:41:50,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:41:50,806 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:41:50,806 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:41:51,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5797,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:41:51,006 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:41:51,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:41:51,007 INFO L82 PathProgramCache]: Analyzing trace with hash -2005899507, now seen corresponding path program 70 times [2021-06-05 06:41:51,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:41:51,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731880290] [2021-06-05 06:41:51,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:41:51,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:41:51,040 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:41:51,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:41:51,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731880290] [2021-06-05 06:41:51,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731880290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:41:51,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204171170] [2021-06-05 06:41:51,041 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:41:51,065 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:41:51,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:41:51,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:41:51,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:41:51,130 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:41:51,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204171170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:41:51,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:41:51,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 06:41:51,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876341127] [2021-06-05 06:41:51,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:41:51,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:41:51,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:41:51,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:41:51,131 INFO L87 Difference]: Start difference. First operand 3385 states and 12018 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:41:51,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:41:51,705 INFO L93 Difference]: Finished difference Result 7940 states and 25456 transitions. [2021-06-05 06:41:51,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 06:41:51,705 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:41:51,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:41:51,716 INFO L225 Difference]: With dead ends: 7940 [2021-06-05 06:41:51,716 INFO L226 Difference]: Without dead ends: 7927 [2021-06-05 06:41:51,717 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 333.8ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 06:41:51,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7927 states. [2021-06-05 06:41:51,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7927 to 4042. [2021-06-05 06:41:51,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4042 states, 4041 states have (on average 3.5921801534273694) internal successors, (14516), 4041 states have internal predecessors, (14516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:41:51,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4042 states to 4042 states and 14516 transitions. [2021-06-05 06:41:51,800 INFO L78 Accepts]: Start accepts. Automaton has 4042 states and 14516 transitions. Word has length 28 [2021-06-05 06:41:51,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:41:51,800 INFO L482 AbstractCegarLoop]: Abstraction has 4042 states and 14516 transitions. [2021-06-05 06:41:51,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:41:51,800 INFO L276 IsEmpty]: Start isEmpty. Operand 4042 states and 14516 transitions. [2021-06-05 06:41:51,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:41:51,805 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:41:51,805 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:41:52,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5798,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:41:52,006 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:41:52,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:41:52,006 INFO L82 PathProgramCache]: Analyzing trace with hash -534821389, now seen corresponding path program 71 times [2021-06-05 06:41:52,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:41:52,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127429757] [2021-06-05 06:41:52,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:41:52,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:41:52,057 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:41:52,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:41:52,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127429757] [2021-06-05 06:41:52,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127429757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:41:52,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997741426] [2021-06-05 06:41:52,058 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:41:52,080 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:41:52,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:41:52,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:41:52,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:41:52,147 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:41:52,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997741426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:41:52,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:41:52,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 06:41:52,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927039849] [2021-06-05 06:41:52,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:41:52,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:41:52,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:41:52,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:41:52,148 INFO L87 Difference]: Start difference. First operand 4042 states and 14516 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:41:52,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:41:52,715 INFO L93 Difference]: Finished difference Result 8192 states and 26150 transitions. [2021-06-05 06:41:52,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 06:41:52,716 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:41:52,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:41:52,727 INFO L225 Difference]: With dead ends: 8192 [2021-06-05 06:41:52,728 INFO L226 Difference]: Without dead ends: 8192 [2021-06-05 06:41:52,728 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 351.8ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 06:41:52,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8192 states. [2021-06-05 06:41:52,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8192 to 3795. [2021-06-05 06:41:52,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3795 states, 3794 states have (on average 3.5579862941486557) internal successors, (13499), 3794 states have internal predecessors, (13499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:41:52,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3795 states to 3795 states and 13499 transitions. [2021-06-05 06:41:52,833 INFO L78 Accepts]: Start accepts. Automaton has 3795 states and 13499 transitions. Word has length 28 [2021-06-05 06:41:52,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:41:52,833 INFO L482 AbstractCegarLoop]: Abstraction has 3795 states and 13499 transitions. [2021-06-05 06:41:52,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:41:52,833 INFO L276 IsEmpty]: Start isEmpty. Operand 3795 states and 13499 transitions. [2021-06-05 06:41:52,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:41:52,837 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:41:52,837 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:41:53,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5799,143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:41:53,038 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:41:53,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:41:53,038 INFO L82 PathProgramCache]: Analyzing trace with hash -967697993, now seen corresponding path program 72 times [2021-06-05 06:41:53,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:41:53,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57936571] [2021-06-05 06:41:53,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:41:53,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:41:53,070 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:41:53,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:41:53,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57936571] [2021-06-05 06:41:53,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57936571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:41:53,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529287357] [2021-06-05 06:41:53,070 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:41:53,094 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 06:41:53,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:41:53,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:41:53,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:41:53,157 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:41:53,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529287357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:41:53,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:41:53,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 06:41:53,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506274504] [2021-06-05 06:41:53,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:41:53,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:41:53,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:41:53,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:41:53,158 INFO L87 Difference]: Start difference. First operand 3795 states and 13499 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:41:53,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:41:53,808 INFO L93 Difference]: Finished difference Result 7285 states and 23940 transitions. [2021-06-05 06:41:53,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 06:41:53,809 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:41:53,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:41:53,820 INFO L225 Difference]: With dead ends: 7285 [2021-06-05 06:41:53,820 INFO L226 Difference]: Without dead ends: 7281 [2021-06-05 06:41:53,821 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 372.5ms TimeCoverageRelationStatistics Valid=600, Invalid=2052, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 06:41:53,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7281 states. [2021-06-05 06:41:53,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7281 to 3428. [2021-06-05 06:41:53,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3428 states, 3427 states have (on average 3.604610446454625) internal successors, (12353), 3427 states have internal predecessors, (12353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:41:53,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3428 states to 3428 states and 12353 transitions. [2021-06-05 06:41:53,894 INFO L78 Accepts]: Start accepts. Automaton has 3428 states and 12353 transitions. Word has length 28 [2021-06-05 06:41:53,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:41:53,894 INFO L482 AbstractCegarLoop]: Abstraction has 3428 states and 12353 transitions. [2021-06-05 06:41:53,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:41:53,894 INFO L276 IsEmpty]: Start isEmpty. Operand 3428 states and 12353 transitions. [2021-06-05 06:41:53,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:41:53,898 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:41:53,898 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:41:54,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5800,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:41:54,101 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:41:54,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:41:54,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1239707183, now seen corresponding path program 73 times [2021-06-05 06:41:54,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:41:54,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137674744] [2021-06-05 06:41:54,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:41:54,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:41:54,136 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:41:54,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:41:54,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137674744] [2021-06-05 06:41:54,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137674744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:41:54,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165889278] [2021-06-05 06:41:54,136 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:41:54,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:41:54,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:41:54,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:41:54,249 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:41:54,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165889278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:41:54,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:41:54,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 06:41:54,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165009386] [2021-06-05 06:41:54,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:41:54,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:41:54,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:41:54,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:41:54,250 INFO L87 Difference]: Start difference. First operand 3428 states and 12353 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:41:55,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:41:55,283 INFO L93 Difference]: Finished difference Result 11601 states and 38335 transitions. [2021-06-05 06:41:55,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 06:41:55,283 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:41:55,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:41:55,301 INFO L225 Difference]: With dead ends: 11601 [2021-06-05 06:41:55,301 INFO L226 Difference]: Without dead ends: 11601 [2021-06-05 06:41:55,302 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 580.5ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 06:41:55,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11601 states. [2021-06-05 06:41:55,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11601 to 3716. [2021-06-05 06:41:55,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3716 states, 3715 states have (on average 3.6855989232839836) internal successors, (13692), 3715 states have internal predecessors, (13692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:41:55,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3716 states to 3716 states and 13692 transitions. [2021-06-05 06:41:55,414 INFO L78 Accepts]: Start accepts. Automaton has 3716 states and 13692 transitions. Word has length 28 [2021-06-05 06:41:55,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:41:55,414 INFO L482 AbstractCegarLoop]: Abstraction has 3716 states and 13692 transitions. [2021-06-05 06:41:55,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:41:55,414 INFO L276 IsEmpty]: Start isEmpty. Operand 3716 states and 13692 transitions. [2021-06-05 06:41:55,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:41:55,419 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:41:55,419 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:41:55,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5801 [2021-06-05 06:41:55,619 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:41:55,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:41:55,619 INFO L82 PathProgramCache]: Analyzing trace with hash -672755103, now seen corresponding path program 74 times [2021-06-05 06:41:55,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:41:55,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401151036] [2021-06-05 06:41:55,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:41:55,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:41:55,654 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:41:55,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:41:55,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401151036] [2021-06-05 06:41:55,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401151036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:41:55,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368773269] [2021-06-05 06:41:55,655 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:41:55,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:41:55,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:41:55,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:41:55,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:41:55,769 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:41:55,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368773269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:41:55,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:41:55,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 06:41:55,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940248166] [2021-06-05 06:41:55,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:41:55,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:41:55,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:41:55,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:41:55,770 INFO L87 Difference]: Start difference. First operand 3716 states and 13692 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:41:56,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:41:56,775 INFO L93 Difference]: Finished difference Result 11295 states and 37518 transitions. [2021-06-05 06:41:56,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 06:41:56,775 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:41:56,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:41:56,793 INFO L225 Difference]: With dead ends: 11295 [2021-06-05 06:41:56,793 INFO L226 Difference]: Without dead ends: 11295 [2021-06-05 06:41:56,793 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1729 ImplicationChecksByTransitivity, 590.1ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 06:41:56,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11295 states. [2021-06-05 06:41:56,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11295 to 3670. [2021-06-05 06:41:56,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3670 states, 3669 states have (on average 3.666121559007904) internal successors, (13451), 3669 states have internal predecessors, (13451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:41:56,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3670 states to 3670 states and 13451 transitions. [2021-06-05 06:41:56,898 INFO L78 Accepts]: Start accepts. Automaton has 3670 states and 13451 transitions. Word has length 28 [2021-06-05 06:41:56,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:41:56,898 INFO L482 AbstractCegarLoop]: Abstraction has 3670 states and 13451 transitions. [2021-06-05 06:41:56,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:41:56,898 INFO L276 IsEmpty]: Start isEmpty. Operand 3670 states and 13451 transitions. [2021-06-05 06:41:56,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:41:56,903 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:41:56,903 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:41:57,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5802,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:41:57,103 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:41:57,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:41:57,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1845100961, now seen corresponding path program 75 times [2021-06-05 06:41:57,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:41:57,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249116646] [2021-06-05 06:41:57,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:41:57,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:41:57,135 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:41:57,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:41:57,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249116646] [2021-06-05 06:41:57,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249116646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:41:57,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075458860] [2021-06-05 06:41:57,136 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:41:57,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 06:41:57,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:41:57,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:41:57,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:41:57,236 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:41:57,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075458860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:41:57,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:41:57,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 06:41:57,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960132232] [2021-06-05 06:41:57,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:41:57,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:41:57,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:41:57,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:41:57,237 INFO L87 Difference]: Start difference. First operand 3670 states and 13451 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:41:58,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:41:58,106 INFO L93 Difference]: Finished difference Result 10610 states and 34061 transitions. [2021-06-05 06:41:58,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 06:41:58,107 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:41:58,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:41:58,123 INFO L225 Difference]: With dead ends: 10610 [2021-06-05 06:41:58,123 INFO L226 Difference]: Without dead ends: 10610 [2021-06-05 06:41:58,124 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1465 ImplicationChecksByTransitivity, 481.6ms TimeCoverageRelationStatistics Valid=821, Invalid=3085, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 06:41:58,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10610 states. [2021-06-05 06:41:58,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10610 to 3710. [2021-06-05 06:41:58,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3710 states, 3709 states have (on average 3.6702615260177947) internal successors, (13613), 3709 states have internal predecessors, (13613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:41:58,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3710 states to 3710 states and 13613 transitions. [2021-06-05 06:41:58,230 INFO L78 Accepts]: Start accepts. Automaton has 3710 states and 13613 transitions. Word has length 28 [2021-06-05 06:41:58,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:41:58,230 INFO L482 AbstractCegarLoop]: Abstraction has 3710 states and 13613 transitions. [2021-06-05 06:41:58,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:41:58,230 INFO L276 IsEmpty]: Start isEmpty. Operand 3710 states and 13613 transitions. [2021-06-05 06:41:58,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:41:58,234 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:41:58,235 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:41:58,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5803,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:41:58,435 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:41:58,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:41:58,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1763724873, now seen corresponding path program 76 times [2021-06-05 06:41:58,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:41:58,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179405608] [2021-06-05 06:41:58,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:41:58,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:41:58,489 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:41:58,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:41:58,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179405608] [2021-06-05 06:41:58,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179405608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:41:58,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354945493] [2021-06-05 06:41:58,489 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 06:41:58,522 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:41:58,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:41:58,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:41:58,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:41:58,593 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:41:58,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354945493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:41:58,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:41:58,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 06:41:58,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529458516] [2021-06-05 06:41:58,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:41:58,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:41:58,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:41:58,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:41:58,594 INFO L87 Difference]: Start difference. First operand 3710 states and 13613 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:41:59,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:41:59,437 INFO L93 Difference]: Finished difference Result 9989 states and 32538 transitions. [2021-06-05 06:41:59,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 06:41:59,437 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:41:59,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:41:59,452 INFO L225 Difference]: With dead ends: 9989 [2021-06-05 06:41:59,452 INFO L226 Difference]: Without dead ends: 9981 [2021-06-05 06:41:59,452 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 459.9ms TimeCoverageRelationStatistics Valid=776, Invalid=2764, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 06:41:59,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9981 states. [2021-06-05 06:41:59,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9981 to 3676. [2021-06-05 06:41:59,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3676 states, 3675 states have (on average 3.6653061224489796) internal successors, (13470), 3675 states have internal predecessors, (13470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:41:59,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3676 states to 3676 states and 13470 transitions. [2021-06-05 06:41:59,554 INFO L78 Accepts]: Start accepts. Automaton has 3676 states and 13470 transitions. Word has length 28 [2021-06-05 06:41:59,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:41:59,554 INFO L482 AbstractCegarLoop]: Abstraction has 3676 states and 13470 transitions. [2021-06-05 06:41:59,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:41:59,554 INFO L276 IsEmpty]: Start isEmpty. Operand 3676 states and 13470 transitions. [2021-06-05 06:41:59,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:41:59,559 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:41:59,559 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:41:59,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5804,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:41:59,759 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:41:59,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:41:59,759 INFO L82 PathProgramCache]: Analyzing trace with hash -833067657, now seen corresponding path program 77 times [2021-06-05 06:41:59,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:41:59,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660885623] [2021-06-05 06:41:59,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:41:59,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:41:59,791 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:41:59,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:41:59,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660885623] [2021-06-05 06:41:59,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660885623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:41:59,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011574221] [2021-06-05 06:41:59,792 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:41:59,815 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 06:41:59,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:41:59,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:41:59,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:41:59,909 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:41:59,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011574221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:41:59,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:41:59,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 06:41:59,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23215613] [2021-06-05 06:41:59,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:41:59,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:41:59,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:41:59,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:41:59,909 INFO L87 Difference]: Start difference. First operand 3676 states and 13470 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:00,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:42:00,845 INFO L93 Difference]: Finished difference Result 9584 states and 31413 transitions. [2021-06-05 06:42:00,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 06:42:00,846 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:42:00,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:42:00,860 INFO L225 Difference]: With dead ends: 9584 [2021-06-05 06:42:00,860 INFO L226 Difference]: Without dead ends: 9584 [2021-06-05 06:42:00,861 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 503.9ms TimeCoverageRelationStatistics Valid=820, Invalid=2962, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 06:42:00,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9584 states. [2021-06-05 06:42:00,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9584 to 3692. [2021-06-05 06:42:00,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3692 states, 3691 states have (on average 3.666756976429152) internal successors, (13534), 3691 states have internal predecessors, (13534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:00,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3692 states to 3692 states and 13534 transitions. [2021-06-05 06:42:00,966 INFO L78 Accepts]: Start accepts. Automaton has 3692 states and 13534 transitions. Word has length 28 [2021-06-05 06:42:00,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:42:00,966 INFO L482 AbstractCegarLoop]: Abstraction has 3692 states and 13534 transitions. [2021-06-05 06:42:00,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:00,966 INFO L276 IsEmpty]: Start isEmpty. Operand 3692 states and 13534 transitions. [2021-06-05 06:42:00,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:42:00,970 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:42:00,971 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:42:01,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5805 [2021-06-05 06:42:01,171 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:42:01,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:42:01,171 INFO L82 PathProgramCache]: Analyzing trace with hash 809971497, now seen corresponding path program 78 times [2021-06-05 06:42:01,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:42:01,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023820250] [2021-06-05 06:42:01,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:42:01,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:42:01,214 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:42:01,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:42:01,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023820250] [2021-06-05 06:42:01,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023820250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:01,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010471145] [2021-06-05 06:42:01,214 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:42:01,239 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 06:42:01,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:42:01,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:42:01,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:42:01,326 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:42:01,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010471145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:01,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:42:01,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 06:42:01,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440866114] [2021-06-05 06:42:01,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:42:01,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:42:01,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:42:01,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:42:01,327 INFO L87 Difference]: Start difference. First operand 3692 states and 13534 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:02,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:42:02,217 INFO L93 Difference]: Finished difference Result 9249 states and 30618 transitions. [2021-06-05 06:42:02,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 06:42:02,217 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:42:02,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:42:02,231 INFO L225 Difference]: With dead ends: 9249 [2021-06-05 06:42:02,231 INFO L226 Difference]: Without dead ends: 9241 [2021-06-05 06:42:02,231 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 484.1ms TimeCoverageRelationStatistics Valid=800, Invalid=2740, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 06:42:02,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9241 states. [2021-06-05 06:42:02,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9241 to 3360. [2021-06-05 06:42:02,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3360 states, 3359 states have (on average 3.5802322119678474) internal successors, (12026), 3359 states have internal predecessors, (12026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:02,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3360 states to 3360 states and 12026 transitions. [2021-06-05 06:42:02,321 INFO L78 Accepts]: Start accepts. Automaton has 3360 states and 12026 transitions. Word has length 28 [2021-06-05 06:42:02,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:42:02,321 INFO L482 AbstractCegarLoop]: Abstraction has 3360 states and 12026 transitions. [2021-06-05 06:42:02,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:02,321 INFO L276 IsEmpty]: Start isEmpty. Operand 3360 states and 12026 transitions. [2021-06-05 06:42:02,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:42:02,325 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:42:02,325 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:42:02,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5806 [2021-06-05 06:42:02,525 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:42:02,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:42:02,525 INFO L82 PathProgramCache]: Analyzing trace with hash 893375077, now seen corresponding path program 79 times [2021-06-05 06:42:02,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:42:02,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896691705] [2021-06-05 06:42:02,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:42:02,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:42:02,558 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:42:02,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:42:02,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896691705] [2021-06-05 06:42:02,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896691705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:02,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055979468] [2021-06-05 06:42:02,559 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:42:02,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:42:02,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:42:02,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:42:02,668 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:42:02,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055979468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:02,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:42:02,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 06:42:02,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042564938] [2021-06-05 06:42:02,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:42:02,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:42:02,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:42:02,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:42:02,669 INFO L87 Difference]: Start difference. First operand 3360 states and 12026 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:03,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:42:03,517 INFO L93 Difference]: Finished difference Result 7017 states and 22977 transitions. [2021-06-05 06:42:03,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 06:42:03,518 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:42:03,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:42:03,528 INFO L225 Difference]: With dead ends: 7017 [2021-06-05 06:42:03,528 INFO L226 Difference]: Without dead ends: 7017 [2021-06-05 06:42:03,529 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 500.2ms TimeCoverageRelationStatistics Valid=709, Invalid=2713, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 06:42:03,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7017 states. [2021-06-05 06:42:03,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7017 to 3372. [2021-06-05 06:42:03,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3372 states, 3371 states have (on average 3.5787600118659153) internal successors, (12064), 3371 states have internal predecessors, (12064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:03,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3372 states to 3372 states and 12064 transitions. [2021-06-05 06:42:03,599 INFO L78 Accepts]: Start accepts. Automaton has 3372 states and 12064 transitions. Word has length 28 [2021-06-05 06:42:03,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:42:03,599 INFO L482 AbstractCegarLoop]: Abstraction has 3372 states and 12064 transitions. [2021-06-05 06:42:03,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:03,599 INFO L276 IsEmpty]: Start isEmpty. Operand 3372 states and 12064 transitions. [2021-06-05 06:42:03,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:42:03,603 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:42:03,603 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:42:03,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5807 [2021-06-05 06:42:03,803 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:42:03,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:42:03,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1748232043, now seen corresponding path program 80 times [2021-06-05 06:42:03,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:42:03,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082632148] [2021-06-05 06:42:03,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:42:03,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:42:03,837 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:42:03,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:42:03,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082632148] [2021-06-05 06:42:03,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082632148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:03,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422652369] [2021-06-05 06:42:03,837 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:42:03,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:42:03,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:42:03,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:42:03,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:42:03,960 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:42:03,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422652369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:03,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:42:03,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 06:42:03,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589880981] [2021-06-05 06:42:03,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:42:03,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:42:03,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:42:03,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:42:03,961 INFO L87 Difference]: Start difference. First operand 3372 states and 12064 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:04,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:42:04,989 INFO L93 Difference]: Finished difference Result 7945 states and 25366 transitions. [2021-06-05 06:42:04,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 06:42:04,989 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:42:04,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:42:05,001 INFO L225 Difference]: With dead ends: 7945 [2021-06-05 06:42:05,001 INFO L226 Difference]: Without dead ends: 7945 [2021-06-05 06:42:05,001 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1919 ImplicationChecksByTransitivity, 672.1ms TimeCoverageRelationStatistics Valid=1012, Invalid=4244, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 06:42:05,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7945 states. [2021-06-05 06:42:05,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7945 to 3438. [2021-06-05 06:42:05,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3438 states, 3437 states have (on average 3.5731742798952575) internal successors, (12281), 3437 states have internal predecessors, (12281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:05,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3438 states to 3438 states and 12281 transitions. [2021-06-05 06:42:05,079 INFO L78 Accepts]: Start accepts. Automaton has 3438 states and 12281 transitions. Word has length 28 [2021-06-05 06:42:05,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:42:05,079 INFO L482 AbstractCegarLoop]: Abstraction has 3438 states and 12281 transitions. [2021-06-05 06:42:05,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:05,079 INFO L276 IsEmpty]: Start isEmpty. Operand 3438 states and 12281 transitions. [2021-06-05 06:42:05,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:42:05,083 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:42:05,083 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:42:05,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5808 [2021-06-05 06:42:05,284 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:42:05,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:42:05,284 INFO L82 PathProgramCache]: Analyzing trace with hash -105192889, now seen corresponding path program 81 times [2021-06-05 06:42:05,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:42:05,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80981941] [2021-06-05 06:42:05,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:42:05,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:42:05,317 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:42:05,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:42:05,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80981941] [2021-06-05 06:42:05,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80981941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:05,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809111483] [2021-06-05 06:42:05,317 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:42:05,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 06:42:05,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:42:05,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:42:05,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:42:05,438 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:42:05,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809111483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:05,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:42:05,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 06:42:05,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870545647] [2021-06-05 06:42:05,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:42:05,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:42:05,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:42:05,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:42:05,438 INFO L87 Difference]: Start difference. First operand 3438 states and 12281 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:06,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:42:06,387 INFO L93 Difference]: Finished difference Result 7328 states and 23738 transitions. [2021-06-05 06:42:06,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 06:42:06,387 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:42:06,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:42:06,399 INFO L225 Difference]: With dead ends: 7328 [2021-06-05 06:42:06,399 INFO L226 Difference]: Without dead ends: 7324 [2021-06-05 06:42:06,400 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1534 ImplicationChecksByTransitivity, 593.7ms TimeCoverageRelationStatistics Valid=914, Invalid=3508, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 06:42:06,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7324 states. [2021-06-05 06:42:06,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7324 to 3373. [2021-06-05 06:42:06,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3373 states, 3372 states have (on average 3.5711743772241995) internal successors, (12042), 3372 states have internal predecessors, (12042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:06,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3373 states to 3373 states and 12042 transitions. [2021-06-05 06:42:06,477 INFO L78 Accepts]: Start accepts. Automaton has 3373 states and 12042 transitions. Word has length 28 [2021-06-05 06:42:06,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:42:06,477 INFO L482 AbstractCegarLoop]: Abstraction has 3373 states and 12042 transitions. [2021-06-05 06:42:06,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:06,477 INFO L276 IsEmpty]: Start isEmpty. Operand 3373 states and 12042 transitions. [2021-06-05 06:42:06,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:42:06,481 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:42:06,481 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:42:06,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5809 [2021-06-05 06:42:06,682 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:42:06,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:42:06,682 INFO L82 PathProgramCache]: Analyzing trace with hash 474250335, now seen corresponding path program 72 times [2021-06-05 06:42:06,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:42:06,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543230515] [2021-06-05 06:42:06,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:42:06,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:42:06,721 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:42:06,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:42:06,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543230515] [2021-06-05 06:42:06,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543230515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:06,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675255491] [2021-06-05 06:42:06,721 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:42:06,744 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:42:06,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:42:06,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:42:06,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:42:06,814 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:42:06,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675255491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:06,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:42:06,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 06:42:06,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064219332] [2021-06-05 06:42:06,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:42:06,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:42:06,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:42:06,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:42:06,815 INFO L87 Difference]: Start difference. First operand 3373 states and 12042 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:07,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:42:07,447 INFO L93 Difference]: Finished difference Result 6471 states and 21326 transitions. [2021-06-05 06:42:07,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 06:42:07,447 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:42:07,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:42:07,457 INFO L225 Difference]: With dead ends: 6471 [2021-06-05 06:42:07,457 INFO L226 Difference]: Without dead ends: 6471 [2021-06-05 06:42:07,458 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 336.0ms TimeCoverageRelationStatistics Valid=407, Invalid=1399, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 06:42:07,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6471 states. [2021-06-05 06:42:07,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6471 to 3377. [2021-06-05 06:42:07,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3377 states, 3376 states have (on average 3.572867298578199) internal successors, (12062), 3376 states have internal predecessors, (12062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:07,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3377 states to 3377 states and 12062 transitions. [2021-06-05 06:42:07,520 INFO L78 Accepts]: Start accepts. Automaton has 3377 states and 12062 transitions. Word has length 28 [2021-06-05 06:42:07,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:42:07,520 INFO L482 AbstractCegarLoop]: Abstraction has 3377 states and 12062 transitions. [2021-06-05 06:42:07,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:07,520 INFO L276 IsEmpty]: Start isEmpty. Operand 3377 states and 12062 transitions. [2021-06-05 06:42:07,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:42:07,524 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:42:07,524 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:42:07,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5810,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:42:07,725 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:42:07,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:42:07,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1137549427, now seen corresponding path program 73 times [2021-06-05 06:42:07,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:42:07,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867291571] [2021-06-05 06:42:07,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:42:07,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:42:07,766 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:42:07,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:42:07,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867291571] [2021-06-05 06:42:07,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867291571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:07,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550139647] [2021-06-05 06:42:07,766 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:42:07,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:42:07,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:42:07,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:42:07,858 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:42:07,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550139647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:07,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:42:07,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 06:42:07,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079686792] [2021-06-05 06:42:07,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:42:07,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:42:07,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:42:07,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:42:07,859 INFO L87 Difference]: Start difference. First operand 3377 states and 12062 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:08,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:42:08,556 INFO L93 Difference]: Finished difference Result 6945 states and 22648 transitions. [2021-06-05 06:42:08,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 06:42:08,557 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:42:08,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:42:08,567 INFO L225 Difference]: With dead ends: 6945 [2021-06-05 06:42:08,567 INFO L226 Difference]: Without dead ends: 6945 [2021-06-05 06:42:08,568 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 427.4ms TimeCoverageRelationStatistics Valid=638, Invalid=2118, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 06:42:08,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6945 states. [2021-06-05 06:42:08,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6945 to 3391. [2021-06-05 06:42:08,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3391 states, 3390 states have (on average 3.5702064896755163) internal successors, (12103), 3390 states have internal predecessors, (12103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:08,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3391 states to 3391 states and 12103 transitions. [2021-06-05 06:42:08,638 INFO L78 Accepts]: Start accepts. Automaton has 3391 states and 12103 transitions. Word has length 28 [2021-06-05 06:42:08,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:42:08,638 INFO L482 AbstractCegarLoop]: Abstraction has 3391 states and 12103 transitions. [2021-06-05 06:42:08,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:08,638 INFO L276 IsEmpty]: Start isEmpty. Operand 3391 states and 12103 transitions. [2021-06-05 06:42:08,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:42:08,642 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:42:08,642 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:42:08,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5811 [2021-06-05 06:42:08,842 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:42:08,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:42:08,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1369089075, now seen corresponding path program 74 times [2021-06-05 06:42:08,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:42:08,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455644538] [2021-06-05 06:42:08,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:42:08,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:42:08,890 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:42:08,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:42:08,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455644538] [2021-06-05 06:42:08,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455644538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:08,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950123533] [2021-06-05 06:42:08,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:42:08,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:42:08,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:42:08,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:42:08,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:42:09,007 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:42:09,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950123533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:09,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:42:09,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 06:42:09,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606663817] [2021-06-05 06:42:09,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:42:09,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:42:09,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:42:09,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:42:09,007 INFO L87 Difference]: Start difference. First operand 3391 states and 12103 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:09,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:42:09,862 INFO L93 Difference]: Finished difference Result 7449 states and 24075 transitions. [2021-06-05 06:42:09,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 06:42:09,863 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:42:09,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:42:09,873 INFO L225 Difference]: With dead ends: 7449 [2021-06-05 06:42:09,874 INFO L226 Difference]: Without dead ends: 7449 [2021-06-05 06:42:09,874 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1316 ImplicationChecksByTransitivity, 482.2ms TimeCoverageRelationStatistics Valid=777, Invalid=3005, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 06:42:09,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7449 states. [2021-06-05 06:42:09,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7449 to 3471. [2021-06-05 06:42:09,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3471 states, 3470 states have (on average 3.563400576368876) internal successors, (12365), 3470 states have internal predecessors, (12365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:09,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3471 states to 3471 states and 12365 transitions. [2021-06-05 06:42:09,949 INFO L78 Accepts]: Start accepts. Automaton has 3471 states and 12365 transitions. Word has length 28 [2021-06-05 06:42:09,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:42:09,949 INFO L482 AbstractCegarLoop]: Abstraction has 3471 states and 12365 transitions. [2021-06-05 06:42:09,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:09,949 INFO L276 IsEmpty]: Start isEmpty. Operand 3471 states and 12365 transitions. [2021-06-05 06:42:09,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:42:09,953 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:42:09,953 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:42:10,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5812,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:42:10,154 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:42:10,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:42:10,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1349373261, now seen corresponding path program 75 times [2021-06-05 06:42:10,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:42:10,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978521140] [2021-06-05 06:42:10,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:42:10,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:42:10,186 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:42:10,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:42:10,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978521140] [2021-06-05 06:42:10,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978521140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:10,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825234130] [2021-06-05 06:42:10,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:42:10,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 06:42:10,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:42:10,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:42:10,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:42:10,295 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:42:10,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825234130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:10,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:42:10,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-05 06:42:10,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588023806] [2021-06-05 06:42:10,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:42:10,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:42:10,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:42:10,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:42:10,296 INFO L87 Difference]: Start difference. First operand 3471 states and 12365 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:10,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:42:10,796 INFO L93 Difference]: Finished difference Result 7261 states and 24833 transitions. [2021-06-05 06:42:10,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 06:42:10,797 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:42:10,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:42:10,807 INFO L225 Difference]: With dead ends: 7261 [2021-06-05 06:42:10,807 INFO L226 Difference]: Without dead ends: 7261 [2021-06-05 06:42:10,808 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 346.9ms TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 06:42:10,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7261 states. [2021-06-05 06:42:10,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7261 to 4582. [2021-06-05 06:42:10,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4582 states, 4581 states have (on average 3.6797642436149314) internal successors, (16857), 4581 states have internal predecessors, (16857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:10,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4582 states to 4582 states and 16857 transitions. [2021-06-05 06:42:10,919 INFO L78 Accepts]: Start accepts. Automaton has 4582 states and 16857 transitions. Word has length 28 [2021-06-05 06:42:10,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:42:10,919 INFO L482 AbstractCegarLoop]: Abstraction has 4582 states and 16857 transitions. [2021-06-05 06:42:10,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:10,919 INFO L276 IsEmpty]: Start isEmpty. Operand 4582 states and 16857 transitions. [2021-06-05 06:42:10,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:42:10,924 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:42:10,924 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:42:11,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5813,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:42:11,125 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:42:11,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:42:11,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1413910217, now seen corresponding path program 76 times [2021-06-05 06:42:11,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:42:11,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584217375] [2021-06-05 06:42:11,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:42:11,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:42:11,169 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:42:11,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:42:11,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584217375] [2021-06-05 06:42:11,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584217375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:11,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724060098] [2021-06-05 06:42:11,169 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:42:11,191 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:42:11,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:42:11,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:42:11,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:42:11,255 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:42:11,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724060098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:11,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:42:11,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 06:42:11,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333790173] [2021-06-05 06:42:11,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:42:11,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:42:11,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:42:11,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:42:11,256 INFO L87 Difference]: Start difference. First operand 4582 states and 16857 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:11,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:42:11,994 INFO L93 Difference]: Finished difference Result 8354 states and 28597 transitions. [2021-06-05 06:42:11,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 06:42:11,994 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:42:11,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:42:12,007 INFO L225 Difference]: With dead ends: 8354 [2021-06-05 06:42:12,007 INFO L226 Difference]: Without dead ends: 8350 [2021-06-05 06:42:12,008 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 425.6ms TimeCoverageRelationStatistics Valid=697, Invalid=2495, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 06:42:12,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8350 states. [2021-06-05 06:42:12,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8350 to 4474. [2021-06-05 06:42:12,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4474 states, 4473 states have (on average 3.6908115358819584) internal successors, (16509), 4473 states have internal predecessors, (16509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:12,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4474 states to 4474 states and 16509 transitions. [2021-06-05 06:42:12,100 INFO L78 Accepts]: Start accepts. Automaton has 4474 states and 16509 transitions. Word has length 28 [2021-06-05 06:42:12,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:42:12,100 INFO L482 AbstractCegarLoop]: Abstraction has 4474 states and 16509 transitions. [2021-06-05 06:42:12,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:12,100 INFO L276 IsEmpty]: Start isEmpty. Operand 4474 states and 16509 transitions. [2021-06-05 06:42:12,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:42:12,106 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:42:12,106 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:42:12,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5814,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:42:12,306 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:42:12,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:42:12,306 INFO L82 PathProgramCache]: Analyzing trace with hash 606347251, now seen corresponding path program 82 times [2021-06-05 06:42:12,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:42:12,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791324046] [2021-06-05 06:42:12,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:42:12,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:42:12,333 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:42:12,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:42:12,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791324046] [2021-06-05 06:42:12,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791324046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:12,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823244979] [2021-06-05 06:42:12,333 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:42:12,358 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:42:12,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:42:12,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:42:12,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:42:12,436 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:42:12,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823244979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:12,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:42:12,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 06:42:12,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140926893] [2021-06-05 06:42:12,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:42:12,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:42:12,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:42:12,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:42:12,437 INFO L87 Difference]: Start difference. First operand 4474 states and 16509 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:13,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:42:13,251 INFO L93 Difference]: Finished difference Result 9509 states and 32189 transitions. [2021-06-05 06:42:13,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 06:42:13,251 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:42:13,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:42:13,267 INFO L225 Difference]: With dead ends: 9509 [2021-06-05 06:42:13,267 INFO L226 Difference]: Without dead ends: 9497 [2021-06-05 06:42:13,268 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 456.8ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 06:42:13,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9497 states. [2021-06-05 06:42:13,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9497 to 4945. [2021-06-05 06:42:13,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4945 states, 4944 states have (on average 3.7744741100323624) internal successors, (18661), 4944 states have internal predecessors, (18661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:13,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4945 states to 4945 states and 18661 transitions. [2021-06-05 06:42:13,380 INFO L78 Accepts]: Start accepts. Automaton has 4945 states and 18661 transitions. Word has length 28 [2021-06-05 06:42:13,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:42:13,380 INFO L482 AbstractCegarLoop]: Abstraction has 4945 states and 18661 transitions. [2021-06-05 06:42:13,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:13,380 INFO L276 IsEmpty]: Start isEmpty. Operand 4945 states and 18661 transitions. [2021-06-05 06:42:13,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:42:13,388 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:42:13,388 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:42:13,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5815 [2021-06-05 06:42:13,589 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:42:13,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:42:13,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1647278645, now seen corresponding path program 83 times [2021-06-05 06:42:13,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:42:13,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388615801] [2021-06-05 06:42:13,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:42:13,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:42:13,644 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:42:13,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:42:13,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388615801] [2021-06-05 06:42:13,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388615801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:13,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44144264] [2021-06-05 06:42:13,644 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:42:13,669 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:42:13,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:42:13,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:42:13,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:42:13,751 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:42:13,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44144264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:13,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:42:13,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 06:42:13,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74254504] [2021-06-05 06:42:13,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:42:13,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:42:13,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:42:13,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:42:13,752 INFO L87 Difference]: Start difference. First operand 4945 states and 18661 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:14,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:42:14,565 INFO L93 Difference]: Finished difference Result 9844 states and 33233 transitions. [2021-06-05 06:42:14,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 06:42:14,565 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:42:14,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:42:14,581 INFO L225 Difference]: With dead ends: 9844 [2021-06-05 06:42:14,581 INFO L226 Difference]: Without dead ends: 9844 [2021-06-05 06:42:14,582 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 466.0ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 06:42:14,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9844 states. [2021-06-05 06:42:14,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9844 to 4966. [2021-06-05 06:42:14,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4966 states, 4965 states have (on average 3.7593152064451156) internal successors, (18665), 4965 states have internal predecessors, (18665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:14,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4966 states to 4966 states and 18665 transitions. [2021-06-05 06:42:14,692 INFO L78 Accepts]: Start accepts. Automaton has 4966 states and 18665 transitions. Word has length 28 [2021-06-05 06:42:14,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:42:14,693 INFO L482 AbstractCegarLoop]: Abstraction has 4966 states and 18665 transitions. [2021-06-05 06:42:14,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:14,693 INFO L276 IsEmpty]: Start isEmpty. Operand 4966 states and 18665 transitions. [2021-06-05 06:42:14,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:42:14,699 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:42:14,700 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:42:14,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5816,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:42:14,900 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:42:14,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:42:14,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1444282361, now seen corresponding path program 84 times [2021-06-05 06:42:14,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:42:14,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809622813] [2021-06-05 06:42:14,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:42:14,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:42:14,937 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:42:14,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:42:14,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809622813] [2021-06-05 06:42:14,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809622813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:14,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696272386] [2021-06-05 06:42:14,938 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:42:14,960 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:42:14,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:42:14,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:42:14,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:42:15,018 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:42:15,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696272386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:15,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:42:15,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 06:42:15,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845007968] [2021-06-05 06:42:15,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:42:15,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:42:15,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:42:15,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:42:15,019 INFO L87 Difference]: Start difference. First operand 4966 states and 18665 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:15,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:42:15,414 INFO L93 Difference]: Finished difference Result 9292 states and 33167 transitions. [2021-06-05 06:42:15,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 06:42:15,415 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:42:15,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:42:15,432 INFO L225 Difference]: With dead ends: 9292 [2021-06-05 06:42:15,432 INFO L226 Difference]: Without dead ends: 9209 [2021-06-05 06:42:15,433 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 219.3ms TimeCoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 06:42:15,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9209 states. [2021-06-05 06:42:15,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9209 to 6387. [2021-06-05 06:42:15,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6387 states, 6386 states have (on average 3.8042593172564985) internal successors, (24294), 6386 states have internal predecessors, (24294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:15,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6387 states to 6387 states and 24294 transitions. [2021-06-05 06:42:15,563 INFO L78 Accepts]: Start accepts. Automaton has 6387 states and 24294 transitions. Word has length 28 [2021-06-05 06:42:15,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:42:15,563 INFO L482 AbstractCegarLoop]: Abstraction has 6387 states and 24294 transitions. [2021-06-05 06:42:15,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:15,563 INFO L276 IsEmpty]: Start isEmpty. Operand 6387 states and 24294 transitions. [2021-06-05 06:42:15,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:42:15,573 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:42:15,573 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:42:15,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5817 [2021-06-05 06:42:15,773 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:42:15,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:42:15,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1642669955, now seen corresponding path program 85 times [2021-06-05 06:42:15,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:42:15,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349231030] [2021-06-05 06:42:15,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:42:15,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:42:15,798 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:42:15,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:42:15,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349231030] [2021-06-05 06:42:15,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349231030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:15,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765380617] [2021-06-05 06:42:15,799 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:42:15,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:42:15,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:42:15,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:42:15,871 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:42:15,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765380617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:15,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:42:15,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-06-05 06:42:15,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325808727] [2021-06-05 06:42:15,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 06:42:15,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:42:15,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 06:42:15,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 06:42:15,872 INFO L87 Difference]: Start difference. First operand 6387 states and 24294 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:16,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:42:16,049 INFO L93 Difference]: Finished difference Result 8813 states and 31347 transitions. [2021-06-05 06:42:16,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 06:42:16,050 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:42:16,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:42:16,065 INFO L225 Difference]: With dead ends: 8813 [2021-06-05 06:42:16,065 INFO L226 Difference]: Without dead ends: 8813 [2021-06-05 06:42:16,065 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 108.6ms TimeCoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:42:16,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8813 states. [2021-06-05 06:42:16,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8813 to 6533. [2021-06-05 06:42:16,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6533 states, 6532 states have (on average 3.7819963257807716) internal successors, (24704), 6532 states have internal predecessors, (24704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:16,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6533 states to 6533 states and 24704 transitions. [2021-06-05 06:42:16,183 INFO L78 Accepts]: Start accepts. Automaton has 6533 states and 24704 transitions. Word has length 28 [2021-06-05 06:42:16,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:42:16,183 INFO L482 AbstractCegarLoop]: Abstraction has 6533 states and 24704 transitions. [2021-06-05 06:42:16,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:16,183 INFO L276 IsEmpty]: Start isEmpty. Operand 6533 states and 24704 transitions. [2021-06-05 06:42:16,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:42:16,193 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:42:16,193 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:42:16,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5818,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:42:16,402 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:42:16,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:42:16,402 INFO L82 PathProgramCache]: Analyzing trace with hash -712470211, now seen corresponding path program 86 times [2021-06-05 06:42:16,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:42:16,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529718033] [2021-06-05 06:42:16,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:42:16,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:42:16,440 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:42:16,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:42:16,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529718033] [2021-06-05 06:42:16,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529718033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:16,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828424400] [2021-06-05 06:42:16,440 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:42:16,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:42:16,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:42:16,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:42:16,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:42:16,523 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:42:16,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828424400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:16,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:42:16,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 06:42:16,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336268178] [2021-06-05 06:42:16,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:42:16,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:42:16,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:42:16,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:42:16,524 INFO L87 Difference]: Start difference. First operand 6533 states and 24704 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:17,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:42:17,249 INFO L93 Difference]: Finished difference Result 13541 states and 47408 transitions. [2021-06-05 06:42:17,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 06:42:17,249 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:42:17,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:42:17,276 INFO L225 Difference]: With dead ends: 13541 [2021-06-05 06:42:17,276 INFO L226 Difference]: Without dead ends: 13541 [2021-06-05 06:42:17,276 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 428.5ms TimeCoverageRelationStatistics Valid=657, Invalid=2205, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 06:42:17,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13541 states. [2021-06-05 06:42:17,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13541 to 7282. [2021-06-05 06:42:17,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7282 states, 7281 states have (on average 3.7915121549237742) internal successors, (27606), 7281 states have internal predecessors, (27606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:17,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7282 states to 7282 states and 27606 transitions. [2021-06-05 06:42:17,453 INFO L78 Accepts]: Start accepts. Automaton has 7282 states and 27606 transitions. Word has length 28 [2021-06-05 06:42:17,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:42:17,453 INFO L482 AbstractCegarLoop]: Abstraction has 7282 states and 27606 transitions. [2021-06-05 06:42:17,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:17,453 INFO L276 IsEmpty]: Start isEmpty. Operand 7282 states and 27606 transitions. [2021-06-05 06:42:17,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:42:17,464 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:42:17,464 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:42:17,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5819 [2021-06-05 06:42:17,665 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:42:17,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:42:17,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1190209241, now seen corresponding path program 87 times [2021-06-05 06:42:17,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:42:17,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073687724] [2021-06-05 06:42:17,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:42:17,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:42:17,697 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:42:17,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:42:17,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073687724] [2021-06-05 06:42:17,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073687724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:17,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666989349] [2021-06-05 06:42:17,698 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:42:17,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 06:42:17,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:42:17,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:42:17,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:42:17,781 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:42:17,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666989349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:17,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:42:17,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-05 06:42:17,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570488545] [2021-06-05 06:42:17,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:42:17,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:42:17,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:42:17,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:42:17,782 INFO L87 Difference]: Start difference. First operand 7282 states and 27606 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:18,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:42:18,419 INFO L93 Difference]: Finished difference Result 13742 states and 48131 transitions. [2021-06-05 06:42:18,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 06:42:18,420 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:42:18,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:42:18,447 INFO L225 Difference]: With dead ends: 13742 [2021-06-05 06:42:18,447 INFO L226 Difference]: Without dead ends: 13742 [2021-06-05 06:42:18,447 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 352.2ms TimeCoverageRelationStatistics Valid=542, Invalid=1908, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 06:42:18,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13742 states. [2021-06-05 06:42:18,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13742 to 7548. [2021-06-05 06:42:18,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7548 states, 7547 states have (on average 3.7695773154895984) internal successors, (28449), 7547 states have internal predecessors, (28449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:18,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7548 states to 7548 states and 28449 transitions. [2021-06-05 06:42:18,626 INFO L78 Accepts]: Start accepts. Automaton has 7548 states and 28449 transitions. Word has length 28 [2021-06-05 06:42:18,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:42:18,626 INFO L482 AbstractCegarLoop]: Abstraction has 7548 states and 28449 transitions. [2021-06-05 06:42:18,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:18,627 INFO L276 IsEmpty]: Start isEmpty. Operand 7548 states and 28449 transitions. [2021-06-05 06:42:18,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:42:18,638 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:42:18,638 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:42:18,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5820 [2021-06-05 06:42:18,838 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:42:18,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:42:18,838 INFO L82 PathProgramCache]: Analyzing trace with hash 107186585, now seen corresponding path program 88 times [2021-06-05 06:42:18,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:42:18,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900104551] [2021-06-05 06:42:18,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:42:18,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:42:18,864 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:42:18,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:42:18,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900104551] [2021-06-05 06:42:18,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900104551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:18,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062114405] [2021-06-05 06:42:18,864 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:42:18,886 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:42:18,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:42:18,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:42:18,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:42:18,941 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:42:18,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062114405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:18,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:42:18,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 06:42:18,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391687487] [2021-06-05 06:42:18,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:42:18,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:42:18,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:42:18,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:42:18,942 INFO L87 Difference]: Start difference. First operand 7548 states and 28449 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:19,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:42:19,304 INFO L93 Difference]: Finished difference Result 10106 states and 36610 transitions. [2021-06-05 06:42:19,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 06:42:19,304 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:42:19,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:42:19,321 INFO L225 Difference]: With dead ends: 10106 [2021-06-05 06:42:19,321 INFO L226 Difference]: Without dead ends: 10076 [2021-06-05 06:42:19,321 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 172.9ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:42:19,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10076 states. [2021-06-05 06:42:19,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10076 to 8389. [2021-06-05 06:42:19,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8389 states, 8388 states have (on average 3.790414878397711) internal successors, (31794), 8388 states have internal predecessors, (31794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:19,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8389 states to 8389 states and 31794 transitions. [2021-06-05 06:42:19,467 INFO L78 Accepts]: Start accepts. Automaton has 8389 states and 31794 transitions. Word has length 28 [2021-06-05 06:42:19,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:42:19,467 INFO L482 AbstractCegarLoop]: Abstraction has 8389 states and 31794 transitions. [2021-06-05 06:42:19,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:19,467 INFO L276 IsEmpty]: Start isEmpty. Operand 8389 states and 31794 transitions. [2021-06-05 06:42:19,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:42:19,479 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:42:19,479 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:42:19,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5821,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:42:19,679 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:42:19,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:42:19,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1578264703, now seen corresponding path program 89 times [2021-06-05 06:42:19,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:42:19,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79417537] [2021-06-05 06:42:19,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:42:19,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:42:19,713 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:42:19,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:42:19,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79417537] [2021-06-05 06:42:19,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79417537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:19,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631534976] [2021-06-05 06:42:19,713 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:42:19,743 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:42:19,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:42:19,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:42:19,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:42:19,800 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:42:19,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631534976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:19,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:42:19,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 06:42:19,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026068773] [2021-06-05 06:42:19,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:42:19,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:42:19,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:42:19,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:42:19,801 INFO L87 Difference]: Start difference. First operand 8389 states and 31794 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:20,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:42:20,121 INFO L93 Difference]: Finished difference Result 10680 states and 38512 transitions. [2021-06-05 06:42:20,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 06:42:20,121 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:42:20,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:42:20,139 INFO L225 Difference]: With dead ends: 10680 [2021-06-05 06:42:20,139 INFO L226 Difference]: Without dead ends: 10680 [2021-06-05 06:42:20,140 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 176.8ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:42:20,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10680 states. [2021-06-05 06:42:20,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10680 to 8429. [2021-06-05 06:42:20,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8429 states, 8428 states have (on average 3.786544850498339) internal successors, (31913), 8428 states have internal predecessors, (31913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:20,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8429 states to 8429 states and 31913 transitions. [2021-06-05 06:42:20,291 INFO L78 Accepts]: Start accepts. Automaton has 8429 states and 31913 transitions. Word has length 28 [2021-06-05 06:42:20,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:42:20,291 INFO L482 AbstractCegarLoop]: Abstraction has 8429 states and 31913 transitions. [2021-06-05 06:42:20,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:20,292 INFO L276 IsEmpty]: Start isEmpty. Operand 8429 states and 31913 transitions. [2021-06-05 06:42:20,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:42:20,303 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:42:20,304 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:42:20,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5822,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:42:20,504 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:42:20,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:42:20,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1145388099, now seen corresponding path program 90 times [2021-06-05 06:42:20,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:42:20,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136262299] [2021-06-05 06:42:20,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:42:20,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:42:20,542 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:42:20,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:42:20,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136262299] [2021-06-05 06:42:20,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136262299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:20,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933848098] [2021-06-05 06:42:20,543 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:42:20,565 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 06:42:20,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:42:20,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:42:20,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:42:20,617 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:42:20,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933848098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:20,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:42:20,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-05 06:42:20,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934489141] [2021-06-05 06:42:20,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:42:20,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:42:20,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:42:20,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:42:20,618 INFO L87 Difference]: Start difference. First operand 8429 states and 31913 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:21,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:42:21,197 INFO L93 Difference]: Finished difference Result 14428 states and 51414 transitions. [2021-06-05 06:42:21,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 06:42:21,197 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:42:21,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:42:21,224 INFO L225 Difference]: With dead ends: 14428 [2021-06-05 06:42:21,224 INFO L226 Difference]: Without dead ends: 14424 [2021-06-05 06:42:21,224 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 313.2ms TimeCoverageRelationStatistics Valid=474, Invalid=1596, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 06:42:21,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14424 states. [2021-06-05 06:42:21,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14424 to 8333. [2021-06-05 06:42:21,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8333 states, 8332 states have (on average 3.790326452232357) internal successors, (31581), 8332 states have internal predecessors, (31581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:21,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8333 states to 8333 states and 31581 transitions. [2021-06-05 06:42:21,443 INFO L78 Accepts]: Start accepts. Automaton has 8333 states and 31581 transitions. Word has length 28 [2021-06-05 06:42:21,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:42:21,443 INFO L482 AbstractCegarLoop]: Abstraction has 8333 states and 31581 transitions. [2021-06-05 06:42:21,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:21,444 INFO L276 IsEmpty]: Start isEmpty. Operand 8333 states and 31581 transitions. [2021-06-05 06:42:21,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:42:21,456 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:42:21,456 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:42:21,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5823,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:42:21,656 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:42:21,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:42:21,657 INFO L82 PathProgramCache]: Analyzing trace with hash 249567283, now seen corresponding path program 91 times [2021-06-05 06:42:21,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:42:21,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793006632] [2021-06-05 06:42:21,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:42:21,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:42:21,687 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:42:21,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:42:21,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793006632] [2021-06-05 06:42:21,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793006632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:21,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412779157] [2021-06-05 06:42:21,687 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:42:21,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:42:21,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:42:21,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:42:21,767 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:42:21,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412779157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:21,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:42:21,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 06:42:21,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321634377] [2021-06-05 06:42:21,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:42:21,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:42:21,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:42:21,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:42:21,768 INFO L87 Difference]: Start difference. First operand 8333 states and 31581 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:22,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:42:22,185 INFO L93 Difference]: Finished difference Result 10897 states and 39312 transitions. [2021-06-05 06:42:22,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 06:42:22,186 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:42:22,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:42:22,205 INFO L225 Difference]: With dead ends: 10897 [2021-06-05 06:42:22,205 INFO L226 Difference]: Without dead ends: 10897 [2021-06-05 06:42:22,205 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 219.1ms TimeCoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 06:42:22,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10897 states. [2021-06-05 06:42:22,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10897 to 8279. [2021-06-05 06:42:22,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8279 states, 8278 states have (on average 3.783884996375936) internal successors, (31323), 8278 states have internal predecessors, (31323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:22,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8279 states to 8279 states and 31323 transitions. [2021-06-05 06:42:22,355 INFO L78 Accepts]: Start accepts. Automaton has 8279 states and 31323 transitions. Word has length 28 [2021-06-05 06:42:22,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:42:22,355 INFO L482 AbstractCegarLoop]: Abstraction has 8279 states and 31323 transitions. [2021-06-05 06:42:22,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:22,355 INFO L276 IsEmpty]: Start isEmpty. Operand 8279 states and 31323 transitions. [2021-06-05 06:42:22,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:42:22,367 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:42:22,367 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:42:22,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5824,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:42:22,567 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:42:22,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:42:22,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1742724757, now seen corresponding path program 92 times [2021-06-05 06:42:22,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:42:22,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472948740] [2021-06-05 06:42:22,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:42:22,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:42:22,605 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:42:22,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:42:22,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472948740] [2021-06-05 06:42:22,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472948740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:22,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101730801] [2021-06-05 06:42:22,605 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:42:22,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:42:22,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:42:22,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:42:22,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:42:22,681 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:42:22,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101730801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:22,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:42:22,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 06:42:22,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214284750] [2021-06-05 06:42:22,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:42:22,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:42:22,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:42:22,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:42:22,682 INFO L87 Difference]: Start difference. First operand 8279 states and 31323 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:23,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:42:23,349 INFO L93 Difference]: Finished difference Result 14309 states and 50902 transitions. [2021-06-05 06:42:23,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 06:42:23,350 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:42:23,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:42:23,377 INFO L225 Difference]: With dead ends: 14309 [2021-06-05 06:42:23,377 INFO L226 Difference]: Without dead ends: 14297 [2021-06-05 06:42:23,377 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 357.9ms TimeCoverageRelationStatistics Valid=564, Invalid=1986, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 06:42:23,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14297 states. [2021-06-05 06:42:23,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14297 to 8279. [2021-06-05 06:42:23,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8279 states, 8278 states have (on average 3.782918579366997) internal successors, (31315), 8278 states have internal predecessors, (31315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:23,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8279 states to 8279 states and 31315 transitions. [2021-06-05 06:42:23,555 INFO L78 Accepts]: Start accepts. Automaton has 8279 states and 31315 transitions. Word has length 28 [2021-06-05 06:42:23,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:42:23,556 INFO L482 AbstractCegarLoop]: Abstraction has 8279 states and 31315 transitions. [2021-06-05 06:42:23,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:23,556 INFO L276 IsEmpty]: Start isEmpty. Operand 8279 states and 31315 transitions. [2021-06-05 06:42:23,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:42:23,567 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:42:23,567 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:42:23,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5825 [2021-06-05 06:42:23,768 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:42:23,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:42:23,768 INFO L82 PathProgramCache]: Analyzing trace with hash -25556159, now seen corresponding path program 93 times [2021-06-05 06:42:23,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:42:23,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078612956] [2021-06-05 06:42:23,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:42:23,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:42:23,864 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:42:23,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:42:23,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078612956] [2021-06-05 06:42:23,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078612956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:23,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756414851] [2021-06-05 06:42:23,864 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:42:23,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 06:42:23,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:42:23,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:42:23,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:42:23,963 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:42:23,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756414851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:23,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:42:23,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 06:42:23,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842124913] [2021-06-05 06:42:23,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:42:23,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:42:23,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:42:23,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:42:23,964 INFO L87 Difference]: Start difference. First operand 8279 states and 31315 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:25,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:42:25,056 INFO L93 Difference]: Finished difference Result 22023 states and 77007 transitions. [2021-06-05 06:42:25,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 06:42:25,057 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:42:25,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:42:25,097 INFO L225 Difference]: With dead ends: 22023 [2021-06-05 06:42:25,098 INFO L226 Difference]: Without dead ends: 22023 [2021-06-05 06:42:25,098 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 723.8ms TimeCoverageRelationStatistics Valid=1218, Invalid=4482, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 06:42:25,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22023 states. [2021-06-05 06:42:25,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22023 to 11426. [2021-06-05 06:42:25,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11426 states, 11425 states have (on average 3.8267833698030636) internal successors, (43721), 11425 states have internal predecessors, (43721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:25,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11426 states to 11426 states and 43721 transitions. [2021-06-05 06:42:25,438 INFO L78 Accepts]: Start accepts. Automaton has 11426 states and 43721 transitions. Word has length 28 [2021-06-05 06:42:25,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:42:25,438 INFO L482 AbstractCegarLoop]: Abstraction has 11426 states and 43721 transitions. [2021-06-05 06:42:25,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:25,438 INFO L276 IsEmpty]: Start isEmpty. Operand 11426 states and 43721 transitions. [2021-06-05 06:42:25,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:42:25,455 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:42:25,455 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:42:25,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5826,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:42:25,656 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:42:25,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:42:25,656 INFO L82 PathProgramCache]: Analyzing trace with hash 55819929, now seen corresponding path program 94 times [2021-06-05 06:42:25,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:42:25,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146855797] [2021-06-05 06:42:25,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:42:25,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:42:25,693 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:42:25,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:42:25,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146855797] [2021-06-05 06:42:25,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146855797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:25,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187240125] [2021-06-05 06:42:25,693 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:42:25,715 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:42:25,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:42:25,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:42:25,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:42:25,777 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:42:25,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187240125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:25,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:42:25,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 06:42:25,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352410279] [2021-06-05 06:42:25,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:42:25,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:42:25,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:42:25,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:42:25,778 INFO L87 Difference]: Start difference. First operand 11426 states and 43721 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:26,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:42:26,837 INFO L93 Difference]: Finished difference Result 21126 states and 74701 transitions. [2021-06-05 06:42:26,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 06:42:26,837 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:42:26,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:42:26,875 INFO L225 Difference]: With dead ends: 21126 [2021-06-05 06:42:26,876 INFO L226 Difference]: Without dead ends: 21114 [2021-06-05 06:42:26,876 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1690 ImplicationChecksByTransitivity, 629.2ms TimeCoverageRelationStatistics Valid=1059, Invalid=3771, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 06:42:26,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21114 states. [2021-06-05 06:42:27,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21114 to 11260. [2021-06-05 06:42:27,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11260 states, 11259 states have (on average 3.8314237498889776) internal successors, (43138), 11259 states have internal predecessors, (43138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:27,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11260 states to 11260 states and 43138 transitions. [2021-06-05 06:42:27,198 INFO L78 Accepts]: Start accepts. Automaton has 11260 states and 43138 transitions. Word has length 28 [2021-06-05 06:42:27,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:42:27,198 INFO L482 AbstractCegarLoop]: Abstraction has 11260 states and 43138 transitions. [2021-06-05 06:42:27,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:27,198 INFO L276 IsEmpty]: Start isEmpty. Operand 11260 states and 43138 transitions. [2021-06-05 06:42:27,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:42:27,214 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:42:27,215 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:42:27,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5827 [2021-06-05 06:42:27,415 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:42:27,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:42:27,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1459272043, now seen corresponding path program 95 times [2021-06-05 06:42:27,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:42:27,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148129543] [2021-06-05 06:42:27,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:42:27,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:42:27,462 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:42:27,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:42:27,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148129543] [2021-06-05 06:42:27,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148129543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:27,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773053717] [2021-06-05 06:42:27,462 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:42:27,487 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 06:42:27,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:42:27,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:42:27,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:42:27,556 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:42:27,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773053717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:27,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:42:27,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 06:42:27,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873334811] [2021-06-05 06:42:27,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:42:27,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:42:27,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:42:27,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:42:27,556 INFO L87 Difference]: Start difference. First operand 11260 states and 43138 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:28,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:42:28,579 INFO L93 Difference]: Finished difference Result 21002 states and 74111 transitions. [2021-06-05 06:42:28,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 06:42:28,579 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:42:28,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:42:28,617 INFO L225 Difference]: With dead ends: 21002 [2021-06-05 06:42:28,618 INFO L226 Difference]: Without dead ends: 20966 [2021-06-05 06:42:28,618 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1419 ImplicationChecksByTransitivity, 559.7ms TimeCoverageRelationStatistics Valid=906, Invalid=3384, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 06:42:28,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20966 states. [2021-06-05 06:42:28,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20966 to 11300. [2021-06-05 06:42:28,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11300 states, 11299 states have (on average 3.8306044782724133) internal successors, (43282), 11299 states have internal predecessors, (43282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:28,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11300 states to 11300 states and 43282 transitions. [2021-06-05 06:42:28,908 INFO L78 Accepts]: Start accepts. Automaton has 11300 states and 43282 transitions. Word has length 28 [2021-06-05 06:42:28,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:42:28,908 INFO L482 AbstractCegarLoop]: Abstraction has 11300 states and 43282 transitions. [2021-06-05 06:42:28,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:28,908 INFO L276 IsEmpty]: Start isEmpty. Operand 11300 states and 43282 transitions. [2021-06-05 06:42:28,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:42:28,924 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:42:28,924 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:42:29,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5828,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:42:29,125 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:42:29,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:42:29,125 INFO L82 PathProgramCache]: Analyzing trace with hash 137854673, now seen corresponding path program 96 times [2021-06-05 06:42:29,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:42:29,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111328491] [2021-06-05 06:42:29,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:42:29,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:42:29,164 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:42:29,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:42:29,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111328491] [2021-06-05 06:42:29,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111328491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:29,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624342314] [2021-06-05 06:42:29,164 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:42:29,188 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 06:42:29,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:42:29,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:42:29,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:42:29,277 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:42:29,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624342314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:29,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:42:29,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 06:42:29,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614887838] [2021-06-05 06:42:29,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:42:29,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:42:29,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:42:29,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:42:29,278 INFO L87 Difference]: Start difference. First operand 11300 states and 43282 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:30,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:42:30,634 INFO L93 Difference]: Finished difference Result 20773 states and 73526 transitions. [2021-06-05 06:42:30,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 06:42:30,634 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:42:30,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:42:30,674 INFO L225 Difference]: With dead ends: 20773 [2021-06-05 06:42:30,674 INFO L226 Difference]: Without dead ends: 20773 [2021-06-05 06:42:30,675 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2649 ImplicationChecksByTransitivity, 842.4ms TimeCoverageRelationStatistics Valid=1494, Invalid=5646, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 06:42:30,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20773 states. [2021-06-05 06:42:30,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20773 to 11492. [2021-06-05 06:42:30,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11492 states, 11491 states have (on average 3.8215995126620834) internal successors, (43914), 11491 states have internal predecessors, (43914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:31,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11492 states to 11492 states and 43914 transitions. [2021-06-05 06:42:31,002 INFO L78 Accepts]: Start accepts. Automaton has 11492 states and 43914 transitions. Word has length 28 [2021-06-05 06:42:31,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:42:31,002 INFO L482 AbstractCegarLoop]: Abstraction has 11492 states and 43914 transitions. [2021-06-05 06:42:31,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:31,002 INFO L276 IsEmpty]: Start isEmpty. Operand 11492 states and 43914 transitions. [2021-06-05 06:42:31,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:42:31,019 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:42:31,019 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:42:31,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5829 [2021-06-05 06:42:31,219 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:42:31,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:42:31,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1780893827, now seen corresponding path program 97 times [2021-06-05 06:42:31,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:42:31,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368183917] [2021-06-05 06:42:31,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:42:31,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:42:31,257 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:42:31,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:42:31,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368183917] [2021-06-05 06:42:31,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368183917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:31,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118879264] [2021-06-05 06:42:31,257 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:42:31,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:42:31,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:42:31,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:42:31,361 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:42:31,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118879264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:31,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:42:31,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 06:42:31,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485039324] [2021-06-05 06:42:31,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:42:31,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:42:31,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:42:31,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:42:31,361 INFO L87 Difference]: Start difference. First operand 11492 states and 43914 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:32,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:42:32,597 INFO L93 Difference]: Finished difference Result 20234 states and 72057 transitions. [2021-06-05 06:42:32,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 06:42:32,597 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:42:32,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:42:32,636 INFO L225 Difference]: With dead ends: 20234 [2021-06-05 06:42:32,636 INFO L226 Difference]: Without dead ends: 20222 [2021-06-05 06:42:32,637 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2080 ImplicationChecksByTransitivity, 712.6ms TimeCoverageRelationStatistics Valid=1305, Invalid=4547, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 06:42:32,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20222 states. [2021-06-05 06:42:32,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20222 to 11374. [2021-06-05 06:42:32,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11374 states, 11373 states have (on average 3.8259913831003254) internal successors, (43513), 11373 states have internal predecessors, (43513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:32,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11374 states to 11374 states and 43513 transitions. [2021-06-05 06:42:32,998 INFO L78 Accepts]: Start accepts. Automaton has 11374 states and 43513 transitions. Word has length 28 [2021-06-05 06:42:32,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:42:32,998 INFO L482 AbstractCegarLoop]: Abstraction has 11374 states and 43513 transitions. [2021-06-05 06:42:32,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:32,999 INFO L276 IsEmpty]: Start isEmpty. Operand 11374 states and 43513 transitions. [2021-06-05 06:42:33,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:42:33,016 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:42:33,016 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:42:33,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5830,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:42:33,217 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:42:33,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:42:33,217 INFO L82 PathProgramCache]: Analyzing trace with hash 513436649, now seen corresponding path program 98 times [2021-06-05 06:42:33,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:42:33,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561421717] [2021-06-05 06:42:33,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:42:33,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:42:33,260 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:42:33,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:42:33,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561421717] [2021-06-05 06:42:33,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561421717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:33,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792489350] [2021-06-05 06:42:33,260 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:42:33,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:42:33,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:42:33,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:42:33,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:42:33,385 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:42:33,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792489350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:33,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:42:33,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-05 06:42:33,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701345132] [2021-06-05 06:42:33,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:42:33,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:42:33,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:42:33,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:42:33,386 INFO L87 Difference]: Start difference. First operand 11374 states and 43513 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:34,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:42:34,470 INFO L93 Difference]: Finished difference Result 19474 states and 69973 transitions. [2021-06-05 06:42:34,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 06:42:34,470 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:42:34,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:42:34,507 INFO L225 Difference]: With dead ends: 19474 [2021-06-05 06:42:34,507 INFO L226 Difference]: Without dead ends: 19438 [2021-06-05 06:42:34,508 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1445 ImplicationChecksByTransitivity, 623.9ms TimeCoverageRelationStatistics Valid=951, Invalid=3471, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 06:42:34,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19438 states. [2021-06-05 06:42:34,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19438 to 11398. [2021-06-05 06:42:34,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11398 states, 11397 states have (on average 3.8249539352461173) internal successors, (43593), 11397 states have internal predecessors, (43593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:34,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11398 states to 11398 states and 43593 transitions. [2021-06-05 06:42:34,786 INFO L78 Accepts]: Start accepts. Automaton has 11398 states and 43593 transitions. Word has length 28 [2021-06-05 06:42:34,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:42:34,786 INFO L482 AbstractCegarLoop]: Abstraction has 11398 states and 43593 transitions. [2021-06-05 06:42:34,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:34,786 INFO L276 IsEmpty]: Start isEmpty. Operand 11398 states and 43593 transitions. [2021-06-05 06:42:34,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:42:34,803 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:42:34,803 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:42:35,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5831,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:42:35,003 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:42:35,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:42:35,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1989550525, now seen corresponding path program 99 times [2021-06-05 06:42:35,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:42:35,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353519756] [2021-06-05 06:42:35,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:42:35,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:42:35,036 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:42:35,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:42:35,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353519756] [2021-06-05 06:42:35,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353519756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:35,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546780353] [2021-06-05 06:42:35,037 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:42:35,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:42:35,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:42:35,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:42:35,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:42:35,155 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:42:35,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546780353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:35,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:42:35,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 06:42:35,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442225491] [2021-06-05 06:42:35,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:42:35,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:42:35,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:42:35,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:42:35,156 INFO L87 Difference]: Start difference. First operand 11398 states and 43593 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:36,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:42:36,503 INFO L93 Difference]: Finished difference Result 28545 states and 102022 transitions. [2021-06-05 06:42:36,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 06:42:36,504 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:42:36,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:42:36,565 INFO L225 Difference]: With dead ends: 28545 [2021-06-05 06:42:36,565 INFO L226 Difference]: Without dead ends: 28545 [2021-06-05 06:42:36,565 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2318 ImplicationChecksByTransitivity, 803.8ms TimeCoverageRelationStatistics Valid=1326, Invalid=4680, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 06:42:36,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28545 states. [2021-06-05 06:42:36,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28545 to 11732. [2021-06-05 06:42:36,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11732 states, 11731 states have (on average 3.8504816298695763) internal successors, (45170), 11731 states have internal predecessors, (45170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:36,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11732 states to 11732 states and 45170 transitions. [2021-06-05 06:42:36,943 INFO L78 Accepts]: Start accepts. Automaton has 11732 states and 45170 transitions. Word has length 28 [2021-06-05 06:42:36,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:42:36,943 INFO L482 AbstractCegarLoop]: Abstraction has 11732 states and 45170 transitions. [2021-06-05 06:42:36,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:36,943 INFO L276 IsEmpty]: Start isEmpty. Operand 11732 states and 45170 transitions. [2021-06-05 06:42:36,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:42:36,961 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:42:36,961 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:42:37,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5832,176 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:42:37,162 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:42:37,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:42:37,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1738464691, now seen corresponding path program 100 times [2021-06-05 06:42:37,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:42:37,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639619583] [2021-06-05 06:42:37,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:42:37,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:42:37,195 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:42:37,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:42:37,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639619583] [2021-06-05 06:42:37,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639619583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:37,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921278139] [2021-06-05 06:42:37,195 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:42:37,218 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:42:37,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:42:37,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:42:37,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:42:37,323 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:42:37,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921278139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:37,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:42:37,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 06:42:37,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529502276] [2021-06-05 06:42:37,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:42:37,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:42:37,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:42:37,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:42:37,324 INFO L87 Difference]: Start difference. First operand 11732 states and 45170 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:38,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:42:38,601 INFO L93 Difference]: Finished difference Result 27990 states and 100748 transitions. [2021-06-05 06:42:38,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 06:42:38,602 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:42:38,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:42:38,664 INFO L225 Difference]: With dead ends: 27990 [2021-06-05 06:42:38,664 INFO L226 Difference]: Without dead ends: 27990 [2021-06-05 06:42:38,665 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2286 ImplicationChecksByTransitivity, 764.4ms TimeCoverageRelationStatistics Valid=1315, Invalid=4537, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 06:42:38,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27990 states. [2021-06-05 06:42:39,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27990 to 11622. [2021-06-05 06:42:39,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11622 states, 11621 states have (on average 3.83779364942776) internal successors, (44599), 11621 states have internal predecessors, (44599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:39,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11622 states to 11622 states and 44599 transitions. [2021-06-05 06:42:39,079 INFO L78 Accepts]: Start accepts. Automaton has 11622 states and 44599 transitions. Word has length 28 [2021-06-05 06:42:39,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:42:39,079 INFO L482 AbstractCegarLoop]: Abstraction has 11622 states and 44599 transitions. [2021-06-05 06:42:39,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:39,079 INFO L276 IsEmpty]: Start isEmpty. Operand 11622 states and 44599 transitions. [2021-06-05 06:42:39,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:42:39,096 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:42:39,096 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:42:39,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5833,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:42:39,297 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:42:39,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:42:39,298 INFO L82 PathProgramCache]: Analyzing trace with hash 495642803, now seen corresponding path program 101 times [2021-06-05 06:42:39,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:42:39,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40474160] [2021-06-05 06:42:39,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:42:39,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:42:39,329 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:42:39,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:42:39,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40474160] [2021-06-05 06:42:39,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40474160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:39,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451892854] [2021-06-05 06:42:39,330 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:42:39,353 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:42:39,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:42:39,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:42:39,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:42:39,439 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:42:39,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451892854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:39,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:42:39,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 06:42:39,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320713587] [2021-06-05 06:42:39,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:42:39,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:42:39,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:42:39,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:42:39,440 INFO L87 Difference]: Start difference. First operand 11622 states and 44599 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:40,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:42:40,293 INFO L93 Difference]: Finished difference Result 22146 states and 80034 transitions. [2021-06-05 06:42:40,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 06:42:40,293 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:42:40,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:42:40,336 INFO L225 Difference]: With dead ends: 22146 [2021-06-05 06:42:40,336 INFO L226 Difference]: Without dead ends: 22146 [2021-06-05 06:42:40,337 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 447.6ms TimeCoverageRelationStatistics Valid=668, Invalid=2194, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 06:42:40,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22146 states. [2021-06-05 06:42:40,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22146 to 11631. [2021-06-05 06:42:40,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11631 states, 11630 states have (on average 3.8368013757523647) internal successors, (44622), 11630 states have internal predecessors, (44622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:40,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11631 states to 11631 states and 44622 transitions. [2021-06-05 06:42:40,623 INFO L78 Accepts]: Start accepts. Automaton has 11631 states and 44622 transitions. Word has length 28 [2021-06-05 06:42:40,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:42:40,623 INFO L482 AbstractCegarLoop]: Abstraction has 11631 states and 44622 transitions. [2021-06-05 06:42:40,624 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:40,624 INFO L276 IsEmpty]: Start isEmpty. Operand 11631 states and 44622 transitions. [2021-06-05 06:42:40,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:42:40,640 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:42:40,640 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:42:40,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5834 [2021-06-05 06:42:40,841 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:42:40,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:42:40,841 INFO L82 PathProgramCache]: Analyzing trace with hash -179079075, now seen corresponding path program 102 times [2021-06-05 06:42:40,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:42:40,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699432244] [2021-06-05 06:42:40,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:42:40,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:42:40,873 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:42:40,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:42:40,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699432244] [2021-06-05 06:42:40,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699432244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:40,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437810618] [2021-06-05 06:42:40,873 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:42:40,896 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 06:42:40,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:42:40,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:42:40,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:42:40,980 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:42:40,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437810618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:40,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:42:40,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 06:42:40,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191207002] [2021-06-05 06:42:40,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:42:40,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:42:40,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:42:40,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:42:40,981 INFO L87 Difference]: Start difference. First operand 11631 states and 44622 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:41,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:42:41,742 INFO L93 Difference]: Finished difference Result 20505 states and 74794 transitions. [2021-06-05 06:42:41,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 06:42:41,743 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:42:41,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:42:41,782 INFO L225 Difference]: With dead ends: 20505 [2021-06-05 06:42:41,782 INFO L226 Difference]: Without dead ends: 20505 [2021-06-05 06:42:41,783 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 437.7ms TimeCoverageRelationStatistics Valid=580, Invalid=1870, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 06:42:41,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20505 states. [2021-06-05 06:42:42,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20505 to 11643. [2021-06-05 06:42:42,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11643 states, 11642 states have (on average 3.836110633911699) internal successors, (44660), 11642 states have internal predecessors, (44660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:42,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11643 states to 11643 states and 44660 transitions. [2021-06-05 06:42:42,065 INFO L78 Accepts]: Start accepts. Automaton has 11643 states and 44660 transitions. Word has length 28 [2021-06-05 06:42:42,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:42:42,065 INFO L482 AbstractCegarLoop]: Abstraction has 11643 states and 44660 transitions. [2021-06-05 06:42:42,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:42,065 INFO L276 IsEmpty]: Start isEmpty. Operand 11643 states and 44660 transitions. [2021-06-05 06:42:42,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:42:42,082 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:42:42,082 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:42:42,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5835,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:42:42,282 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:42:42,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:42:42,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1474281101, now seen corresponding path program 103 times [2021-06-05 06:42:42,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:42:42,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95647007] [2021-06-05 06:42:42,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:42:42,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:42:42,315 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:42:42,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:42:42,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95647007] [2021-06-05 06:42:42,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95647007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:42,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713796604] [2021-06-05 06:42:42,315 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:42:42,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:42:42,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:42:42,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:42:42,432 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:42:42,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713796604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:42,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:42:42,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 06:42:42,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142138467] [2021-06-05 06:42:42,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:42:42,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:42:42,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:42:42,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:42:42,433 INFO L87 Difference]: Start difference. First operand 11643 states and 44660 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:43,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:42:43,512 INFO L93 Difference]: Finished difference Result 21288 states and 77031 transitions. [2021-06-05 06:42:43,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 06:42:43,513 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:42:43,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:42:43,555 INFO L225 Difference]: With dead ends: 21288 [2021-06-05 06:42:43,555 INFO L226 Difference]: Without dead ends: 21288 [2021-06-05 06:42:43,555 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1851 ImplicationChecksByTransitivity, 673.4ms TimeCoverageRelationStatistics Valid=1084, Invalid=4028, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 06:42:43,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21288 states. [2021-06-05 06:42:43,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21288 to 11751. [2021-06-05 06:42:43,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11751 states, 11750 states have (on average 3.829276595744681) internal successors, (44994), 11750 states have internal predecessors, (44994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:43,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11751 states to 11751 states and 44994 transitions. [2021-06-05 06:42:43,955 INFO L78 Accepts]: Start accepts. Automaton has 11751 states and 44994 transitions. Word has length 28 [2021-06-05 06:42:43,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:42:43,955 INFO L482 AbstractCegarLoop]: Abstraction has 11751 states and 44994 transitions. [2021-06-05 06:42:43,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:43,955 INFO L276 IsEmpty]: Start isEmpty. Operand 11751 states and 44994 transitions. [2021-06-05 06:42:43,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:42:43,971 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:42:43,971 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:42:44,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5836,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:42:44,172 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:42:44,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:42:44,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1177647041, now seen corresponding path program 104 times [2021-06-05 06:42:44,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:42:44,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846991627] [2021-06-05 06:42:44,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:42:44,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:42:44,204 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:42:44,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:42:44,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846991627] [2021-06-05 06:42:44,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846991627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:44,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885437016] [2021-06-05 06:42:44,205 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:42:44,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:42:44,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:42:44,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:42:44,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:42:44,316 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:42:44,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885437016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:44,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:42:44,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 06:42:44,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055256955] [2021-06-05 06:42:44,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:42:44,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:42:44,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:42:44,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:42:44,317 INFO L87 Difference]: Start difference. First operand 11751 states and 44994 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:45,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:42:45,244 INFO L93 Difference]: Finished difference Result 20669 states and 75327 transitions. [2021-06-05 06:42:45,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 06:42:45,245 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:42:45,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:42:45,287 INFO L225 Difference]: With dead ends: 20669 [2021-06-05 06:42:45,288 INFO L226 Difference]: Without dead ends: 20665 [2021-06-05 06:42:45,288 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1265 ImplicationChecksByTransitivity, 559.9ms TimeCoverageRelationStatistics Valid=880, Invalid=2902, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 06:42:45,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20665 states. [2021-06-05 06:42:45,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20665 to 11677. [2021-06-05 06:42:45,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11677 states, 11676 states have (on average 3.833076396026036) internal successors, (44755), 11676 states have internal predecessors, (44755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:45,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11677 states to 11677 states and 44755 transitions. [2021-06-05 06:42:45,593 INFO L78 Accepts]: Start accepts. Automaton has 11677 states and 44755 transitions. Word has length 28 [2021-06-05 06:42:45,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:42:45,593 INFO L482 AbstractCegarLoop]: Abstraction has 11677 states and 44755 transitions. [2021-06-05 06:42:45,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:45,593 INFO L276 IsEmpty]: Start isEmpty. Operand 11677 states and 44755 transitions. [2021-06-05 06:42:45,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:42:45,610 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:42:45,611 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:42:45,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5837 [2021-06-05 06:42:45,811 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:42:45,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:42:45,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1027792075, now seen corresponding path program 105 times [2021-06-05 06:42:45,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:42:45,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447359065] [2021-06-05 06:42:45,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:42:45,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:42:45,850 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:42:45,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:42:45,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447359065] [2021-06-05 06:42:45,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447359065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:45,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510495667] [2021-06-05 06:42:45,850 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:42:45,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 06:42:45,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:42:45,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:42:45,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:42:45,969 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:42:45,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510495667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:45,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:42:45,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 06:42:45,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122249714] [2021-06-05 06:42:45,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:42:45,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:42:45,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:42:45,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:42:45,970 INFO L87 Difference]: Start difference. First operand 11677 states and 44755 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:47,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:42:47,072 INFO L93 Difference]: Finished difference Result 19974 states and 72092 transitions. [2021-06-05 06:42:47,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 06:42:47,073 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:42:47,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:42:47,112 INFO L225 Difference]: With dead ends: 19974 [2021-06-05 06:42:47,112 INFO L226 Difference]: Without dead ends: 19974 [2021-06-05 06:42:47,113 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1704 ImplicationChecksByTransitivity, 693.8ms TimeCoverageRelationStatistics Valid=1023, Invalid=3669, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 06:42:47,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19974 states. [2021-06-05 06:42:47,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19974 to 11904. [2021-06-05 06:42:47,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11904 states, 11903 states have (on average 3.835419642107032) internal successors, (45653), 11903 states have internal predecessors, (45653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:47,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11904 states to 11904 states and 45653 transitions. [2021-06-05 06:42:47,409 INFO L78 Accepts]: Start accepts. Automaton has 11904 states and 45653 transitions. Word has length 28 [2021-06-05 06:42:47,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:42:47,409 INFO L482 AbstractCegarLoop]: Abstraction has 11904 states and 45653 transitions. [2021-06-05 06:42:47,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:47,409 INFO L276 IsEmpty]: Start isEmpty. Operand 11904 states and 45653 transitions. [2021-06-05 06:42:47,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:42:47,428 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:42:47,428 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:42:47,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5838,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:42:47,628 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:42:47,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:42:47,628 INFO L82 PathProgramCache]: Analyzing trace with hash -2086855541, now seen corresponding path program 106 times [2021-06-05 06:42:47,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:42:47,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911814570] [2021-06-05 06:42:47,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:42:47,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:42:47,667 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:42:47,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:42:47,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911814570] [2021-06-05 06:42:47,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911814570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:47,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10840010] [2021-06-05 06:42:47,667 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:42:47,689 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:42:47,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:42:47,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:42:47,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:42:47,770 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:42:47,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10840010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:47,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:42:47,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 06:42:47,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448542138] [2021-06-05 06:42:47,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:42:47,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:42:47,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:42:47,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:42:47,771 INFO L87 Difference]: Start difference. First operand 11904 states and 45653 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:48,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:42:48,702 INFO L93 Difference]: Finished difference Result 19505 states and 70801 transitions. [2021-06-05 06:42:48,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 06:42:48,703 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:42:48,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:42:48,739 INFO L225 Difference]: With dead ends: 19505 [2021-06-05 06:42:48,740 INFO L226 Difference]: Without dead ends: 19493 [2021-06-05 06:42:48,740 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1425 ImplicationChecksByTransitivity, 542.9ms TimeCoverageRelationStatistics Valid=893, Invalid=3267, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 06:42:48,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19493 states. [2021-06-05 06:42:48,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19493 to 12006. [2021-06-05 06:42:48,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12006 states, 12005 states have (on average 3.829737609329446) internal successors, (45976), 12005 states have internal predecessors, (45976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:49,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12006 states to 12006 states and 45976 transitions. [2021-06-05 06:42:49,015 INFO L78 Accepts]: Start accepts. Automaton has 12006 states and 45976 transitions. Word has length 28 [2021-06-05 06:42:49,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:42:49,015 INFO L482 AbstractCegarLoop]: Abstraction has 12006 states and 45976 transitions. [2021-06-05 06:42:49,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:49,016 INFO L276 IsEmpty]: Start isEmpty. Operand 12006 states and 45976 transitions. [2021-06-05 06:42:49,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:42:49,033 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:42:49,033 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:42:49,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5839 [2021-06-05 06:42:49,234 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:42:49,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:42:49,234 INFO L82 PathProgramCache]: Analyzing trace with hash 2013038777, now seen corresponding path program 77 times [2021-06-05 06:42:49,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:42:49,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203519742] [2021-06-05 06:42:49,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:42:49,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:42:49,273 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:42:49,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:42:49,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203519742] [2021-06-05 06:42:49,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203519742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:49,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110889935] [2021-06-05 06:42:49,273 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:42:49,295 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:42:49,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:42:49,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:42:49,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:42:49,359 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:42:49,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110889935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:49,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:42:49,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 06:42:49,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983559776] [2021-06-05 06:42:49,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:42:49,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:42:49,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:42:49,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:42:49,360 INFO L87 Difference]: Start difference. First operand 12006 states and 45976 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:49,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:42:49,893 INFO L93 Difference]: Finished difference Result 16927 states and 62911 transitions. [2021-06-05 06:42:49,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 06:42:49,893 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:42:49,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:42:49,929 INFO L225 Difference]: With dead ends: 16927 [2021-06-05 06:42:49,929 INFO L226 Difference]: Without dead ends: 16927 [2021-06-05 06:42:49,929 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 284.5ms TimeCoverageRelationStatistics Valid=303, Invalid=887, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:42:49,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16927 states. [2021-06-05 06:42:50,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16927 to 12078. [2021-06-05 06:42:50,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12078 states, 12077 states have (on average 3.8251221329800447) internal successors, (46196), 12077 states have internal predecessors, (46196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:50,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12078 states to 12078 states and 46196 transitions. [2021-06-05 06:42:50,217 INFO L78 Accepts]: Start accepts. Automaton has 12078 states and 46196 transitions. Word has length 28 [2021-06-05 06:42:50,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:42:50,217 INFO L482 AbstractCegarLoop]: Abstraction has 12078 states and 46196 transitions. [2021-06-05 06:42:50,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:50,217 INFO L276 IsEmpty]: Start isEmpty. Operand 12078 states and 46196 transitions. [2021-06-05 06:42:50,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:42:50,234 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:42:50,234 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:42:50,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5840,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:42:50,434 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:42:50,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:42:50,434 INFO L82 PathProgramCache]: Analyzing trace with hash -570762731, now seen corresponding path program 78 times [2021-06-05 06:42:50,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:42:50,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198772094] [2021-06-05 06:42:50,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:42:50,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:42:50,465 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:42:50,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:42:50,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198772094] [2021-06-05 06:42:50,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198772094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:50,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072534265] [2021-06-05 06:42:50,466 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:42:50,488 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:42:50,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:42:50,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:42:50,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:42:50,577 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:42:50,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072534265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:50,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:42:50,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-05 06:42:50,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120571518] [2021-06-05 06:42:50,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:42:50,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:42:50,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:42:50,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:42:50,578 INFO L87 Difference]: Start difference. First operand 12078 states and 46196 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:50,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:42:50,975 INFO L93 Difference]: Finished difference Result 15219 states and 56335 transitions. [2021-06-05 06:42:50,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 06:42:50,976 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:42:50,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:42:51,005 INFO L225 Difference]: With dead ends: 15219 [2021-06-05 06:42:51,006 INFO L226 Difference]: Without dead ends: 15168 [2021-06-05 06:42:51,006 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 262.2ms TimeCoverageRelationStatistics Valid=308, Invalid=952, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 06:42:51,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15168 states. [2021-06-05 06:42:51,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15168 to 11725. [2021-06-05 06:42:51,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11725 states, 11724 states have (on average 3.8169566700784716) internal successors, (44750), 11724 states have internal predecessors, (44750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:51,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11725 states to 11725 states and 44750 transitions. [2021-06-05 06:42:51,222 INFO L78 Accepts]: Start accepts. Automaton has 11725 states and 44750 transitions. Word has length 28 [2021-06-05 06:42:51,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:42:51,223 INFO L482 AbstractCegarLoop]: Abstraction has 11725 states and 44750 transitions. [2021-06-05 06:42:51,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:51,223 INFO L276 IsEmpty]: Start isEmpty. Operand 11725 states and 44750 transitions. [2021-06-05 06:42:51,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:42:51,240 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:42:51,240 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:42:51,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5841,185 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:42:51,440 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:42:51,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:42:51,440 INFO L82 PathProgramCache]: Analyzing trace with hash 242532185, now seen corresponding path program 79 times [2021-06-05 06:42:51,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:42:51,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919513905] [2021-06-05 06:42:51,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:42:51,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:42:51,472 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:42:51,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:42:51,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919513905] [2021-06-05 06:42:51,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919513905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:51,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841451630] [2021-06-05 06:42:51,473 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:42:51,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:42:51,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:42:51,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:42:51,555 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:42:51,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841451630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:51,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:42:51,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 06:42:51,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75508136] [2021-06-05 06:42:51,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:42:51,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:42:51,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:42:51,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:42:51,556 INFO L87 Difference]: Start difference. First operand 11725 states and 44750 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:52,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:42:52,091 INFO L93 Difference]: Finished difference Result 17575 states and 64328 transitions. [2021-06-05 06:42:52,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 06:42:52,092 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:42:52,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:42:52,125 INFO L225 Difference]: With dead ends: 17575 [2021-06-05 06:42:52,125 INFO L226 Difference]: Without dead ends: 17575 [2021-06-05 06:42:52,125 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 310.6ms TimeCoverageRelationStatistics Valid=390, Invalid=1332, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 06:42:52,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17575 states. [2021-06-05 06:42:52,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17575 to 12033. [2021-06-05 06:42:52,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12033 states, 12032 states have (on average 3.8006981382978724) internal successors, (45730), 12032 states have internal predecessors, (45730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:52,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12033 states to 12033 states and 45730 transitions. [2021-06-05 06:42:52,460 INFO L78 Accepts]: Start accepts. Automaton has 12033 states and 45730 transitions. Word has length 28 [2021-06-05 06:42:52,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:42:52,460 INFO L482 AbstractCegarLoop]: Abstraction has 12033 states and 45730 transitions. [2021-06-05 06:42:52,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:52,460 INFO L276 IsEmpty]: Start isEmpty. Operand 12033 states and 45730 transitions. [2021-06-05 06:42:52,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:42:52,477 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:42:52,477 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:42:52,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5842,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:42:52,678 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:42:52,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:42:52,678 INFO L82 PathProgramCache]: Analyzing trace with hash 197711043, now seen corresponding path program 80 times [2021-06-05 06:42:52,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:42:52,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082987373] [2021-06-05 06:42:52,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:42:52,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:42:52,710 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:42:52,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:42:52,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082987373] [2021-06-05 06:42:52,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082987373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:52,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815710136] [2021-06-05 06:42:52,710 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:42:52,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:42:52,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:42:52,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:42:52,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:42:52,790 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:42:52,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815710136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:52,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:42:52,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 06:42:52,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219802496] [2021-06-05 06:42:52,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:42:52,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:42:52,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:42:52,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:42:52,791 INFO L87 Difference]: Start difference. First operand 12033 states and 45730 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:53,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:42:53,209 INFO L93 Difference]: Finished difference Result 17039 states and 62930 transitions. [2021-06-05 06:42:53,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 06:42:53,209 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:42:53,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:42:53,241 INFO L225 Difference]: With dead ends: 17039 [2021-06-05 06:42:53,241 INFO L226 Difference]: Without dead ends: 17031 [2021-06-05 06:42:53,241 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 217.8ms TimeCoverageRelationStatistics Valid=295, Invalid=895, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:42:53,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17031 states. [2021-06-05 06:42:53,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17031 to 11973. [2021-06-05 06:42:53,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11973 states, 11972 states have (on average 3.8028733711994653) internal successors, (45528), 11972 states have internal predecessors, (45528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:53,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11973 states to 11973 states and 45528 transitions. [2021-06-05 06:42:53,486 INFO L78 Accepts]: Start accepts. Automaton has 11973 states and 45528 transitions. Word has length 28 [2021-06-05 06:42:53,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:42:53,486 INFO L482 AbstractCegarLoop]: Abstraction has 11973 states and 45528 transitions. [2021-06-05 06:42:53,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:53,486 INFO L276 IsEmpty]: Start isEmpty. Operand 11973 states and 45528 transitions. [2021-06-05 06:42:53,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:42:53,502 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:42:53,502 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:42:53,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5843,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:42:53,703 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:42:53,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:42:53,703 INFO L82 PathProgramCache]: Analyzing trace with hash 795047701, now seen corresponding path program 81 times [2021-06-05 06:42:53,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:42:53,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449587356] [2021-06-05 06:42:53,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:42:53,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:42:53,741 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:42:53,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:42:53,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449587356] [2021-06-05 06:42:53,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449587356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:53,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198969354] [2021-06-05 06:42:53,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:42:53,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 06:42:53,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:42:53,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:42:53,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:42:53,817 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:42:53,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198969354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:53,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:42:53,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 06:42:53,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998659329] [2021-06-05 06:42:53,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:42:53,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:42:53,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:42:53,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:42:53,818 INFO L87 Difference]: Start difference. First operand 11973 states and 45528 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:54,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:42:54,250 INFO L93 Difference]: Finished difference Result 16939 states and 62644 transitions. [2021-06-05 06:42:54,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 06:42:54,250 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:42:54,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:42:54,281 INFO L225 Difference]: With dead ends: 16939 [2021-06-05 06:42:54,282 INFO L226 Difference]: Without dead ends: 16927 [2021-06-05 06:42:54,282 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 232.9ms TimeCoverageRelationStatistics Valid=329, Invalid=1003, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 06:42:54,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16927 states. [2021-06-05 06:42:54,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16927 to 11945. [2021-06-05 06:42:54,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11945 states, 11944 states have (on average 3.8044206296048224) internal successors, (45440), 11944 states have internal predecessors, (45440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:54,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11945 states to 11945 states and 45440 transitions. [2021-06-05 06:42:54,523 INFO L78 Accepts]: Start accepts. Automaton has 11945 states and 45440 transitions. Word has length 28 [2021-06-05 06:42:54,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:42:54,523 INFO L482 AbstractCegarLoop]: Abstraction has 11945 states and 45440 transitions. [2021-06-05 06:42:54,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:54,523 INFO L276 IsEmpty]: Start isEmpty. Operand 11945 states and 45440 transitions. [2021-06-05 06:42:54,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:42:54,541 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:42:54,541 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:42:54,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5844,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:42:54,741 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:42:54,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:42:54,742 INFO L82 PathProgramCache]: Analyzing trace with hash 139638229, now seen corresponding path program 82 times [2021-06-05 06:42:54,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:42:54,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230795102] [2021-06-05 06:42:54,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:42:54,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:42:54,778 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:42:54,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:42:54,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230795102] [2021-06-05 06:42:54,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230795102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:54,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358298674] [2021-06-05 06:42:54,779 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 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:42:54,801 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:42:54,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:42:54,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:42:54,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:42:54,889 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:42:54,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358298674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:54,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:42:54,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 06:42:54,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952943020] [2021-06-05 06:42:54,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:42:54,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:42:54,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:42:54,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:42:54,890 INFO L87 Difference]: Start difference. First operand 11945 states and 45440 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:55,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:42:55,851 INFO L93 Difference]: Finished difference Result 23123 states and 82678 transitions. [2021-06-05 06:42:55,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 06:42:55,852 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:42:55,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:42:55,894 INFO L225 Difference]: With dead ends: 23123 [2021-06-05 06:42:55,894 INFO L226 Difference]: Without dead ends: 23123 [2021-06-05 06:42:55,894 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 535.7ms TimeCoverageRelationStatistics Valid=798, Invalid=2394, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 06:42:55,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23123 states. [2021-06-05 06:42:56,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23123 to 11925. [2021-06-05 06:42:56,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11925 states, 11924 states have (on average 3.8030862126803084) internal successors, (45348), 11924 states have internal predecessors, (45348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:56,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11925 states to 11925 states and 45348 transitions. [2021-06-05 06:42:56,179 INFO L78 Accepts]: Start accepts. Automaton has 11925 states and 45348 transitions. Word has length 28 [2021-06-05 06:42:56,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:42:56,179 INFO L482 AbstractCegarLoop]: Abstraction has 11925 states and 45348 transitions. [2021-06-05 06:42:56,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:56,179 INFO L276 IsEmpty]: Start isEmpty. Operand 11925 states and 45348 transitions. [2021-06-05 06:42:56,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:42:56,197 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:42:56,197 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:42:56,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5845,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:42:56,398 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:42:56,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:42:56,398 INFO L82 PathProgramCache]: Analyzing trace with hash 666410137, now seen corresponding path program 107 times [2021-06-05 06:42:56,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:42:56,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834786205] [2021-06-05 06:42:56,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:42:56,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:42:56,432 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:42:56,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:42:56,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834786205] [2021-06-05 06:42:56,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834786205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:56,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443729605] [2021-06-05 06:42:56,433 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:42:56,456 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:42:56,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:42:56,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:42:56,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:42:56,538 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:42:56,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443729605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:56,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:42:56,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 06:42:56,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435084974] [2021-06-05 06:42:56,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:42:56,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:42:56,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:42:56,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:42:56,539 INFO L87 Difference]: Start difference. First operand 11925 states and 45348 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:57,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:42:57,254 INFO L93 Difference]: Finished difference Result 18992 states and 68940 transitions. [2021-06-05 06:42:57,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 06:42:57,254 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:42:57,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:42:57,289 INFO L225 Difference]: With dead ends: 18992 [2021-06-05 06:42:57,289 INFO L226 Difference]: Without dead ends: 18979 [2021-06-05 06:42:57,289 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 363.2ms TimeCoverageRelationStatistics Valid=478, Invalid=1414, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 06:42:57,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18979 states. [2021-06-05 06:42:57,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18979 to 13439. [2021-06-05 06:42:57,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13439 states, 13438 states have (on average 3.8746093168626285) internal successors, (52067), 13438 states have internal predecessors, (52067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:57,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13439 states to 13439 states and 52067 transitions. [2021-06-05 06:42:57,596 INFO L78 Accepts]: Start accepts. Automaton has 13439 states and 52067 transitions. Word has length 28 [2021-06-05 06:42:57,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:42:57,596 INFO L482 AbstractCegarLoop]: Abstraction has 13439 states and 52067 transitions. [2021-06-05 06:42:57,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:57,596 INFO L276 IsEmpty]: Start isEmpty. Operand 13439 states and 52067 transitions. [2021-06-05 06:42:57,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:42:57,618 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:42:57,618 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:42:57,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5846 [2021-06-05 06:42:57,819 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:42:57,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:42:57,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1338822919, now seen corresponding path program 108 times [2021-06-05 06:42:57,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:42:57,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94982210] [2021-06-05 06:42:57,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:42:57,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:42:57,845 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:42:57,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:42:57,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94982210] [2021-06-05 06:42:57,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94982210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:57,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362666972] [2021-06-05 06:42:57,846 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:42:57,870 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:42:57,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:42:57,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:42:57,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:42:57,950 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:42:57,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362666972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:57,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:42:57,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 06:42:57,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243614902] [2021-06-05 06:42:57,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:42:57,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:42:57,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:42:57,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:42:57,951 INFO L87 Difference]: Start difference. First operand 13439 states and 52067 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:58,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:42:58,707 INFO L93 Difference]: Finished difference Result 19144 states and 69363 transitions. [2021-06-05 06:42:58,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 06:42:58,708 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:42:58,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:42:58,743 INFO L225 Difference]: With dead ends: 19144 [2021-06-05 06:42:58,743 INFO L226 Difference]: Without dead ends: 19129 [2021-06-05 06:42:58,743 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 400.3ms TimeCoverageRelationStatistics Valid=541, Invalid=1715, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 06:42:58,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19129 states. [2021-06-05 06:42:59,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19129 to 13406. [2021-06-05 06:42:59,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13406 states, 13405 states have (on average 3.873330846698993) internal successors, (51922), 13405 states have internal predecessors, (51922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:59,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13406 states to 13406 states and 51922 transitions. [2021-06-05 06:42:59,098 INFO L78 Accepts]: Start accepts. Automaton has 13406 states and 51922 transitions. Word has length 28 [2021-06-05 06:42:59,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:42:59,098 INFO L482 AbstractCegarLoop]: Abstraction has 13406 states and 51922 transitions. [2021-06-05 06:42:59,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:42:59,098 INFO L276 IsEmpty]: Start isEmpty. Operand 13406 states and 51922 transitions. [2021-06-05 06:42:59,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:42:59,118 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:42:59,118 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:42:59,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5847,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:42:59,319 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:42:59,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:42:59,319 INFO L82 PathProgramCache]: Analyzing trace with hash -476515903, now seen corresponding path program 109 times [2021-06-05 06:42:59,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:42:59,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112759024] [2021-06-05 06:42:59,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:42:59,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:42:59,346 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:42:59,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:42:59,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112759024] [2021-06-05 06:42:59,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112759024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:59,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351866168] [2021-06-05 06:42:59,347 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 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:42:59,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:42:59,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:42:59,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:42:59,441 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:42:59,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351866168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:42:59,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:42:59,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 06:42:59,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433219822] [2021-06-05 06:42:59,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:42:59,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:42:59,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:42:59,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:42:59,442 INFO L87 Difference]: Start difference. First operand 13406 states and 51922 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:00,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:43:00,051 INFO L93 Difference]: Finished difference Result 21469 states and 77902 transitions. [2021-06-05 06:43:00,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 06:43:00,051 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:43:00,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:43:00,090 INFO L225 Difference]: With dead ends: 21469 [2021-06-05 06:43:00,090 INFO L226 Difference]: Without dead ends: 21456 [2021-06-05 06:43:00,090 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 313.2ms TimeCoverageRelationStatistics Valid=416, Invalid=1224, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 06:43:00,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21456 states. [2021-06-05 06:43:00,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21456 to 13488. [2021-06-05 06:43:00,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13488 states, 13487 states have (on average 3.879068732853859) internal successors, (52317), 13487 states have internal predecessors, (52317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:00,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13488 states to 13488 states and 52317 transitions. [2021-06-05 06:43:00,421 INFO L78 Accepts]: Start accepts. Automaton has 13488 states and 52317 transitions. Word has length 28 [2021-06-05 06:43:00,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:43:00,421 INFO L482 AbstractCegarLoop]: Abstraction has 13488 states and 52317 transitions. [2021-06-05 06:43:00,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:00,421 INFO L276 IsEmpty]: Start isEmpty. Operand 13488 states and 52317 transitions. [2021-06-05 06:43:00,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:43:00,442 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:43:00,442 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:43:00,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5848,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:43:00,642 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:43:00,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:43:00,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1159260233, now seen corresponding path program 110 times [2021-06-05 06:43:00,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:43:00,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737259090] [2021-06-05 06:43:00,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:43:00,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:43:00,667 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:43:00,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:43:00,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737259090] [2021-06-05 06:43:00,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737259090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:43:00,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530975761] [2021-06-05 06:43:00,668 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 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:43:00,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:43:00,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:43:00,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:43:00,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:43:00,769 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:43:00,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530975761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:43:00,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:43:00,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 06:43:00,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986797814] [2021-06-05 06:43:00,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:43:00,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:43:00,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:43:00,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:43:00,770 INFO L87 Difference]: Start difference. First operand 13488 states and 52317 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:01,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:43:01,443 INFO L93 Difference]: Finished difference Result 22765 states and 81941 transitions. [2021-06-05 06:43:01,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 06:43:01,443 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:43:01,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:43:01,485 INFO L225 Difference]: With dead ends: 22765 [2021-06-05 06:43:01,485 INFO L226 Difference]: Without dead ends: 22765 [2021-06-05 06:43:01,486 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 366.3ms TimeCoverageRelationStatistics Valid=524, Invalid=1638, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 06:43:01,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22765 states. [2021-06-05 06:43:01,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22765 to 13512. [2021-06-05 06:43:01,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13512 states, 13511 states have (on average 3.8755828584116645) internal successors, (52363), 13511 states have internal predecessors, (52363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:01,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13512 states to 13512 states and 52363 transitions. [2021-06-05 06:43:01,871 INFO L78 Accepts]: Start accepts. Automaton has 13512 states and 52363 transitions. Word has length 28 [2021-06-05 06:43:01,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:43:01,871 INFO L482 AbstractCegarLoop]: Abstraction has 13512 states and 52363 transitions. [2021-06-05 06:43:01,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:01,871 INFO L276 IsEmpty]: Start isEmpty. Operand 13512 states and 52363 transitions. [2021-06-05 06:43:01,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:43:01,891 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:43:01,891 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:43:02,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5849 [2021-06-05 06:43:02,091 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:43:02,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:43:02,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1083104517, now seen corresponding path program 83 times [2021-06-05 06:43:02,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:43:02,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506080234] [2021-06-05 06:43:02,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:43:02,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:43:02,123 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:43:02,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:43:02,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506080234] [2021-06-05 06:43:02,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506080234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:43:02,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954367984] [2021-06-05 06:43:02,124 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:43:02,146 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 06:43:02,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:43:02,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:43:02,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:43:02,216 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:43:02,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954367984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:43:02,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:43:02,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-05 06:43:02,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000687419] [2021-06-05 06:43:02,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:43:02,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:43:02,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:43:02,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:43:02,217 INFO L87 Difference]: Start difference. First operand 13512 states and 52363 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:03,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:43:03,118 INFO L93 Difference]: Finished difference Result 23563 states and 86937 transitions. [2021-06-05 06:43:03,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 06:43:03,118 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:43:03,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:43:03,164 INFO L225 Difference]: With dead ends: 23563 [2021-06-05 06:43:03,164 INFO L226 Difference]: Without dead ends: 23559 [2021-06-05 06:43:03,165 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1239 ImplicationChecksByTransitivity, 502.1ms TimeCoverageRelationStatistics Valid=837, Invalid=2823, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 06:43:03,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23559 states. [2021-06-05 06:43:03,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23559 to 13808. [2021-06-05 06:43:03,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13808 states, 13807 states have (on average 3.86390961106685) internal successors, (53349), 13807 states have internal predecessors, (53349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:03,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13808 states to 13808 states and 53349 transitions. [2021-06-05 06:43:03,523 INFO L78 Accepts]: Start accepts. Automaton has 13808 states and 53349 transitions. Word has length 28 [2021-06-05 06:43:03,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:43:03,523 INFO L482 AbstractCegarLoop]: Abstraction has 13808 states and 53349 transitions. [2021-06-05 06:43:03,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:03,523 INFO L276 IsEmpty]: Start isEmpty. Operand 13808 states and 53349 transitions. [2021-06-05 06:43:03,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:43:03,546 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:43:03,546 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:43:03,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5850 [2021-06-05 06:43:03,747 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:43:03,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:43:03,747 INFO L82 PathProgramCache]: Analyzing trace with hash -217720579, now seen corresponding path program 111 times [2021-06-05 06:43:03,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:43:03,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337936332] [2021-06-05 06:43:03,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:43:03,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:43:03,777 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:43:03,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:43:03,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337936332] [2021-06-05 06:43:03,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337936332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:43:03,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438628164] [2021-06-05 06:43:03,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:43:03,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:43:03,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:43:03,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:43:03,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:43:03,865 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:43:03,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438628164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:43:03,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:43:03,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 06:43:03,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484370693] [2021-06-05 06:43:03,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:43:03,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:43:03,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:43:03,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:43:03,865 INFO L87 Difference]: Start difference. First operand 13808 states and 53349 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:04,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:43:04,475 INFO L93 Difference]: Finished difference Result 20031 states and 73742 transitions. [2021-06-05 06:43:04,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 06:43:04,475 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:43:04,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:43:04,514 INFO L225 Difference]: With dead ends: 20031 [2021-06-05 06:43:04,515 INFO L226 Difference]: Without dead ends: 20008 [2021-06-05 06:43:04,515 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 319.5ms TimeCoverageRelationStatistics Valid=449, Invalid=1273, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 06:43:04,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20008 states. [2021-06-05 06:43:04,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20008 to 13828. [2021-06-05 06:43:04,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13828 states, 13827 states have (on average 3.8711217183770885) internal successors, (53526), 13827 states have internal predecessors, (53526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:04,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13828 states to 13828 states and 53526 transitions. [2021-06-05 06:43:04,887 INFO L78 Accepts]: Start accepts. Automaton has 13828 states and 53526 transitions. Word has length 28 [2021-06-05 06:43:04,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:43:04,887 INFO L482 AbstractCegarLoop]: Abstraction has 13828 states and 53526 transitions. [2021-06-05 06:43:04,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:04,887 INFO L276 IsEmpty]: Start isEmpty. Operand 13828 states and 53526 transitions. [2021-06-05 06:43:04,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:43:04,907 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:43:04,907 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:43:05,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5851,195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:43:05,108 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:43:05,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:43:05,108 INFO L82 PathProgramCache]: Analyzing trace with hash -900464909, now seen corresponding path program 112 times [2021-06-05 06:43:05,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:43:05,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654855049] [2021-06-05 06:43:05,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:43:05,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:43:05,137 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:43:05,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:43:05,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654855049] [2021-06-05 06:43:05,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654855049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:43:05,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106882255] [2021-06-05 06:43:05,138 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:43:05,160 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:43:05,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:43:05,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:43:05,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:43:05,228 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:43:05,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106882255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:43:05,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:43:05,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 06:43:05,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405506784] [2021-06-05 06:43:05,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:43:05,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:43:05,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:43:05,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:43:05,229 INFO L87 Difference]: Start difference. First operand 13828 states and 53526 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:05,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:43:05,957 INFO L93 Difference]: Finished difference Result 19483 states and 70764 transitions. [2021-06-05 06:43:05,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 06:43:05,958 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:43:05,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:43:05,994 INFO L225 Difference]: With dead ends: 19483 [2021-06-05 06:43:05,994 INFO L226 Difference]: Without dead ends: 19483 [2021-06-05 06:43:05,995 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 403.8ms TimeCoverageRelationStatistics Valid=608, Invalid=1744, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 06:43:06,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19483 states. [2021-06-05 06:43:06,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19483 to 13783. [2021-06-05 06:43:06,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13783 states, 13782 states have (on average 3.8633725148744738) internal successors, (53245), 13782 states have internal predecessors, (53245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:06,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13783 states to 13783 states and 53245 transitions. [2021-06-05 06:43:06,296 INFO L78 Accepts]: Start accepts. Automaton has 13783 states and 53245 transitions. Word has length 28 [2021-06-05 06:43:06,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:43:06,297 INFO L482 AbstractCegarLoop]: Abstraction has 13783 states and 53245 transitions. [2021-06-05 06:43:06,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:06,297 INFO L276 IsEmpty]: Start isEmpty. Operand 13783 states and 53245 transitions. [2021-06-05 06:43:06,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:43:06,317 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:43:06,317 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:43:06,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5852,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:43:06,518 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:43:06,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:43:06,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1220583373, now seen corresponding path program 113 times [2021-06-05 06:43:06,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:43:06,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388297969] [2021-06-05 06:43:06,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:43:06,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:43:06,548 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:43:06,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:43:06,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388297969] [2021-06-05 06:43:06,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388297969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:43:06,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651075621] [2021-06-05 06:43:06,548 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 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:43:06,571 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 06:43:06,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:43:06,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:43:06,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:43:06,640 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:43:06,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651075621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:43:06,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:43:06,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 06:43:06,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960898792] [2021-06-05 06:43:06,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:43:06,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:43:06,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:43:06,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:43:06,641 INFO L87 Difference]: Start difference. First operand 13783 states and 53245 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:07,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:43:07,316 INFO L93 Difference]: Finished difference Result 20772 states and 75881 transitions. [2021-06-05 06:43:07,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 06:43:07,317 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:43:07,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:43:07,359 INFO L225 Difference]: With dead ends: 20772 [2021-06-05 06:43:07,359 INFO L226 Difference]: Without dead ends: 20772 [2021-06-05 06:43:07,360 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 358.0ms TimeCoverageRelationStatistics Valid=505, Invalid=1301, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 06:43:07,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20772 states. [2021-06-05 06:43:07,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20772 to 14496. [2021-06-05 06:43:07,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14496 states, 14495 states have (on average 3.84932735426009) internal successors, (55796), 14495 states have internal predecessors, (55796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:07,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14496 states to 14496 states and 55796 transitions. [2021-06-05 06:43:07,771 INFO L78 Accepts]: Start accepts. Automaton has 14496 states and 55796 transitions. Word has length 28 [2021-06-05 06:43:07,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:43:07,771 INFO L482 AbstractCegarLoop]: Abstraction has 14496 states and 55796 transitions. [2021-06-05 06:43:07,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:07,771 INFO L276 IsEmpty]: Start isEmpty. Operand 14496 states and 55796 transitions. [2021-06-05 06:43:07,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:43:07,793 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:43:07,794 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:43:07,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5853 [2021-06-05 06:43:07,994 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:43:07,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:43:07,994 INFO L82 PathProgramCache]: Analyzing trace with hash -331180409, now seen corresponding path program 114 times [2021-06-05 06:43:07,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:43:07,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907501161] [2021-06-05 06:43:07,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:43:07,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:43:08,027 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:43:08,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:43:08,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907501161] [2021-06-05 06:43:08,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907501161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:43:08,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283187548] [2021-06-05 06:43:08,028 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:43:08,051 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:43:08,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:43:08,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:43:08,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:43:08,134 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:43:08,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283187548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:43:08,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:43:08,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 06:43:08,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294937560] [2021-06-05 06:43:08,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:43:08,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:43:08,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:43:08,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:43:08,135 INFO L87 Difference]: Start difference. First operand 14496 states and 55796 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:09,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:43:09,036 INFO L93 Difference]: Finished difference Result 23301 states and 83849 transitions. [2021-06-05 06:43:09,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 06:43:09,036 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:43:09,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:43:09,084 INFO L225 Difference]: With dead ends: 23301 [2021-06-05 06:43:09,084 INFO L226 Difference]: Without dead ends: 23301 [2021-06-05 06:43:09,085 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 483.3ms TimeCoverageRelationStatistics Valid=698, Invalid=1752, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 06:43:09,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23301 states. [2021-06-05 06:43:09,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23301 to 14726. [2021-06-05 06:43:09,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14726 states, 14725 states have (on average 3.8604414261460103) internal successors, (56845), 14725 states have internal predecessors, (56845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:09,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14726 states to 14726 states and 56845 transitions. [2021-06-05 06:43:09,410 INFO L78 Accepts]: Start accepts. Automaton has 14726 states and 56845 transitions. Word has length 28 [2021-06-05 06:43:09,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:43:09,410 INFO L482 AbstractCegarLoop]: Abstraction has 14726 states and 56845 transitions. [2021-06-05 06:43:09,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:09,411 INFO L276 IsEmpty]: Start isEmpty. Operand 14726 states and 56845 transitions. [2021-06-05 06:43:09,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:43:09,432 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:43:09,432 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:43:09,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5854,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:43:09,632 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:43:09,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:43:09,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1653713447, now seen corresponding path program 84 times [2021-06-05 06:43:09,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:43:09,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761264887] [2021-06-05 06:43:09,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:43:09,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:43:09,665 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:43:09,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:43:09,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761264887] [2021-06-05 06:43:09,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761264887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:43:09,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650860011] [2021-06-05 06:43:09,665 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:43:09,688 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 06:43:09,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:43:09,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:43:09,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:43:09,783 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:43:09,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650860011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:43:09,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:43:09,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 06:43:09,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567296531] [2021-06-05 06:43:09,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:43:09,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:43:09,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:43:09,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:43:09,784 INFO L87 Difference]: Start difference. First operand 14726 states and 56845 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:11,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:43:11,217 INFO L93 Difference]: Finished difference Result 41437 states and 148960 transitions. [2021-06-05 06:43:11,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 06:43:11,217 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:43:11,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:43:11,311 INFO L225 Difference]: With dead ends: 41437 [2021-06-05 06:43:11,311 INFO L226 Difference]: Without dead ends: 41437 [2021-06-05 06:43:11,311 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2606 ImplicationChecksByTransitivity, 856.2ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 06:43:11,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41437 states. [2021-06-05 06:43:11,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41437 to 16084. [2021-06-05 06:43:11,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16084 states, 16083 states have (on average 3.9069825281352983) internal successors, (62836), 16083 states have internal predecessors, (62836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:11,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16084 states to 16084 states and 62836 transitions. [2021-06-05 06:43:11,953 INFO L78 Accepts]: Start accepts. Automaton has 16084 states and 62836 transitions. Word has length 28 [2021-06-05 06:43:11,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:43:11,953 INFO L482 AbstractCegarLoop]: Abstraction has 16084 states and 62836 transitions. [2021-06-05 06:43:11,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:11,953 INFO L276 IsEmpty]: Start isEmpty. Operand 16084 states and 62836 transitions. [2021-06-05 06:43:11,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:43:11,976 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:43:11,976 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:43:12,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5855,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:43:12,177 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:43:12,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:43:12,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1086761367, now seen corresponding path program 85 times [2021-06-05 06:43:12,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:43:12,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667213969] [2021-06-05 06:43:12,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:43:12,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:43:12,210 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:43:12,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:43:12,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667213969] [2021-06-05 06:43:12,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667213969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:43:12,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039510451] [2021-06-05 06:43:12,210 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 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:43:12,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:43:12,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:43:12,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:43:12,326 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:43:12,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039510451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:43:12,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:43:12,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 06:43:12,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596063997] [2021-06-05 06:43:12,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:43:12,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:43:12,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:43:12,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:43:12,327 INFO L87 Difference]: Start difference. First operand 16084 states and 62836 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:13,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:43:13,817 INFO L93 Difference]: Finished difference Result 40385 states and 146224 transitions. [2021-06-05 06:43:13,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 06:43:13,817 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:43:13,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:43:13,904 INFO L225 Difference]: With dead ends: 40385 [2021-06-05 06:43:13,904 INFO L226 Difference]: Without dead ends: 40385 [2021-06-05 06:43:13,905 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2605 ImplicationChecksByTransitivity, 877.7ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 06:43:13,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40385 states. [2021-06-05 06:43:14,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40385 to 16052. [2021-06-05 06:43:14,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16052 states, 16051 states have (on average 3.9033082050962555) internal successors, (62652), 16051 states have internal predecessors, (62652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:14,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16052 states to 16052 states and 62652 transitions. [2021-06-05 06:43:14,458 INFO L78 Accepts]: Start accepts. Automaton has 16052 states and 62652 transitions. Word has length 28 [2021-06-05 06:43:14,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:43:14,458 INFO L482 AbstractCegarLoop]: Abstraction has 16052 states and 62652 transitions. [2021-06-05 06:43:14,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:14,458 INFO L276 IsEmpty]: Start isEmpty. Operand 16052 states and 62652 transitions. [2021-06-05 06:43:14,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:43:14,482 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:43:14,482 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:43:14,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5856 [2021-06-05 06:43:14,683 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:43:14,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:43:14,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1368987715, now seen corresponding path program 115 times [2021-06-05 06:43:14,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:43:14,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508730010] [2021-06-05 06:43:14,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:43:14,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:43:14,714 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:43:14,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:43:14,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508730010] [2021-06-05 06:43:14,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508730010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:43:14,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536662826] [2021-06-05 06:43:14,715 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:43:14,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:43:14,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:43:14,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:43:14,786 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:43:14,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536662826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:43:14,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:43:14,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 06:43:14,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137703825] [2021-06-05 06:43:14,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:43:14,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:43:14,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:43:14,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:43:14,787 INFO L87 Difference]: Start difference. First operand 16052 states and 62652 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:15,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:43:15,096 INFO L93 Difference]: Finished difference Result 24998 states and 96107 transitions. [2021-06-05 06:43:15,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 06:43:15,097 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:43:15,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:43:15,152 INFO L225 Difference]: With dead ends: 24998 [2021-06-05 06:43:15,152 INFO L226 Difference]: Without dead ends: 24951 [2021-06-05 06:43:15,153 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 98.3ms TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:43:15,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24951 states. [2021-06-05 06:43:15,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24951 to 20735. [2021-06-05 06:43:15,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20735 states, 20734 states have (on average 3.910244043599884) internal successors, (81075), 20734 states have internal predecessors, (81075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:15,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20735 states to 20735 states and 81075 transitions. [2021-06-05 06:43:15,546 INFO L78 Accepts]: Start accepts. Automaton has 20735 states and 81075 transitions. Word has length 28 [2021-06-05 06:43:15,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:43:15,546 INFO L482 AbstractCegarLoop]: Abstraction has 20735 states and 81075 transitions. [2021-06-05 06:43:15,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:15,547 INFO L276 IsEmpty]: Start isEmpty. Operand 20735 states and 81075 transitions. [2021-06-05 06:43:15,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:43:15,576 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:43:15,576 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:43:15,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5857,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:43:15,776 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:43:15,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:43:15,777 INFO L82 PathProgramCache]: Analyzing trace with hash 541079027, now seen corresponding path program 116 times [2021-06-05 06:43:15,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:43:15,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193618263] [2021-06-05 06:43:15,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:43:15,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:43:15,804 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:43:15,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:43:15,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193618263] [2021-06-05 06:43:15,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193618263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:43:15,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116403117] [2021-06-05 06:43:15,804 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 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:43:15,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:43:15,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:43:15,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:43:15,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:43:15,879 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:43:15,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116403117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:43:15,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:43:15,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 06:43:15,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065220697] [2021-06-05 06:43:15,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:43:15,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:43:15,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:43:15,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:43:15,880 INFO L87 Difference]: Start difference. First operand 20735 states and 81075 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:16,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:43:16,135 INFO L93 Difference]: Finished difference Result 23483 states and 89423 transitions. [2021-06-05 06:43:16,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:43:16,135 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:43:16,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:43:16,183 INFO L225 Difference]: With dead ends: 23483 [2021-06-05 06:43:16,183 INFO L226 Difference]: Without dead ends: 23483 [2021-06-05 06:43:16,183 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 90.2ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:43:16,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23483 states. [2021-06-05 06:43:16,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23483 to 20238. [2021-06-05 06:43:16,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20238 states, 20237 states have (on average 3.89894747245145) internal successors, (78903), 20237 states have internal predecessors, (78903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:16,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20238 states to 20238 states and 78903 transitions. [2021-06-05 06:43:16,582 INFO L78 Accepts]: Start accepts. Automaton has 20238 states and 78903 transitions. Word has length 28 [2021-06-05 06:43:16,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:43:16,582 INFO L482 AbstractCegarLoop]: Abstraction has 20238 states and 78903 transitions. [2021-06-05 06:43:16,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:16,582 INFO L276 IsEmpty]: Start isEmpty. Operand 20238 states and 78903 transitions. [2021-06-05 06:43:16,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:43:16,612 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:43:16,612 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:43:16,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5858 [2021-06-05 06:43:16,812 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:43:16,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:43:16,813 INFO L82 PathProgramCache]: Analyzing trace with hash -410602411, now seen corresponding path program 117 times [2021-06-05 06:43:16,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:43:16,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174592042] [2021-06-05 06:43:16,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:43:16,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:43:16,848 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:43:16,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:43:16,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174592042] [2021-06-05 06:43:16,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174592042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:43:16,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565787237] [2021-06-05 06:43:16,848 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 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:43:16,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:43:16,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:43:16,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:43:16,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:43:16,949 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:43:16,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565787237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:43:16,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:43:16,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-05 06:43:16,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239080611] [2021-06-05 06:43:16,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:43:16,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:43:16,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:43:16,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:43:16,950 INFO L87 Difference]: Start difference. First operand 20238 states and 78903 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:17,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:43:17,828 INFO L93 Difference]: Finished difference Result 32137 states and 119230 transitions. [2021-06-05 06:43:17,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 06:43:17,828 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:43:17,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:43:17,901 INFO L225 Difference]: With dead ends: 32137 [2021-06-05 06:43:17,902 INFO L226 Difference]: Without dead ends: 32137 [2021-06-05 06:43:17,902 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 462.6ms TimeCoverageRelationStatistics Valid=720, Invalid=2472, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 06:43:17,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32137 states. [2021-06-05 06:43:18,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32137 to 20300. [2021-06-05 06:43:18,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20300 states, 20299 states have (on average 3.8972855805704714) internal successors, (79111), 20299 states have internal predecessors, (79111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:18,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20300 states to 20300 states and 79111 transitions. [2021-06-05 06:43:18,445 INFO L78 Accepts]: Start accepts. Automaton has 20300 states and 79111 transitions. Word has length 28 [2021-06-05 06:43:18,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:43:18,445 INFO L482 AbstractCegarLoop]: Abstraction has 20300 states and 79111 transitions. [2021-06-05 06:43:18,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:18,445 INFO L276 IsEmpty]: Start isEmpty. Operand 20300 states and 79111 transitions. [2021-06-05 06:43:18,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:43:18,476 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:43:18,476 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:43:18,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5859,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:43:18,676 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:43:18,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:43:18,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1386921255, now seen corresponding path program 118 times [2021-06-05 06:43:18,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:43:18,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355962542] [2021-06-05 06:43:18,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:43:18,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:43:18,726 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:43:18,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:43:18,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355962542] [2021-06-05 06:43:18,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355962542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:43:18,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053870981] [2021-06-05 06:43:18,727 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 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:43:18,750 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:43:18,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:43:18,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:43:18,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:43:18,845 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:43:18,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053870981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:43:18,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:43:18,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 06:43:18,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146378367] [2021-06-05 06:43:18,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:43:18,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:43:18,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:43:18,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:43:18,846 INFO L87 Difference]: Start difference. First operand 20300 states and 79111 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:20,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:43:20,314 INFO L93 Difference]: Finished difference Result 41281 states and 151393 transitions. [2021-06-05 06:43:20,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 06:43:20,315 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:43:20,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:43:20,414 INFO L225 Difference]: With dead ends: 41281 [2021-06-05 06:43:20,414 INFO L226 Difference]: Without dead ends: 41281 [2021-06-05 06:43:20,415 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3102 ImplicationChecksByTransitivity, 848.3ms TimeCoverageRelationStatistics Valid=1548, Invalid=6284, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 06:43:20,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41281 states. [2021-06-05 06:43:20,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41281 to 20305. [2021-06-05 06:43:20,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20305 states, 20304 states have (on average 3.899330181245075) internal successors, (79172), 20304 states have internal predecessors, (79172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:21,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20305 states to 20305 states and 79172 transitions. [2021-06-05 06:43:21,031 INFO L78 Accepts]: Start accepts. Automaton has 20305 states and 79172 transitions. Word has length 28 [2021-06-05 06:43:21,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:43:21,031 INFO L482 AbstractCegarLoop]: Abstraction has 20305 states and 79172 transitions. [2021-06-05 06:43:21,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:21,031 INFO L276 IsEmpty]: Start isEmpty. Operand 20305 states and 79172 transitions. [2021-06-05 06:43:21,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:43:21,063 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:43:21,063 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:43:21,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5860 [2021-06-05 06:43:21,264 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:43:21,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:43:21,264 INFO L82 PathProgramCache]: Analyzing trace with hash -819969175, now seen corresponding path program 119 times [2021-06-05 06:43:21,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:43:21,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486304628] [2021-06-05 06:43:21,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:43:21,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:43:21,299 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:43:21,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:43:21,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486304628] [2021-06-05 06:43:21,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486304628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:43:21,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448105927] [2021-06-05 06:43:21,300 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 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:43:21,325 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:43:21,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:43:21,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:43:21,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:43:21,415 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:43:21,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448105927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:43:21,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:43:21,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 06:43:21,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258068726] [2021-06-05 06:43:21,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:43:21,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:43:21,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:43:21,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:43:21,416 INFO L87 Difference]: Start difference. First operand 20305 states and 79172 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:22,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:43:22,843 INFO L93 Difference]: Finished difference Result 40959 states and 150883 transitions. [2021-06-05 06:43:22,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 06:43:22,843 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:43:22,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:43:22,938 INFO L225 Difference]: With dead ends: 40959 [2021-06-05 06:43:22,938 INFO L226 Difference]: Without dead ends: 40959 [2021-06-05 06:43:22,939 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2992 ImplicationChecksByTransitivity, 881.2ms TimeCoverageRelationStatistics Valid=1515, Invalid=6141, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 06:43:22,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40959 states. [2021-06-05 06:43:23,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40959 to 20093. [2021-06-05 06:43:23,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20093 states, 20092 states have (on average 3.8916484172805097) internal successors, (78191), 20092 states have internal predecessors, (78191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:23,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20093 states to 20093 states and 78191 transitions. [2021-06-05 06:43:23,536 INFO L78 Accepts]: Start accepts. Automaton has 20093 states and 78191 transitions. Word has length 28 [2021-06-05 06:43:23,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:43:23,536 INFO L482 AbstractCegarLoop]: Abstraction has 20093 states and 78191 transitions. [2021-06-05 06:43:23,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:23,536 INFO L276 IsEmpty]: Start isEmpty. Operand 20093 states and 78191 transitions. [2021-06-05 06:43:23,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:43:23,567 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:43:23,567 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:43:23,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5861,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:43:23,768 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:43:23,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:43:23,768 INFO L82 PathProgramCache]: Analyzing trace with hash 116169497, now seen corresponding path program 120 times [2021-06-05 06:43:23,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:43:23,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710721922] [2021-06-05 06:43:23,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:43:23,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:43:23,795 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:43:23,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:43:23,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710721922] [2021-06-05 06:43:23,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710721922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:43:23,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917737735] [2021-06-05 06:43:23,795 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:43:23,817 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:43:23,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:43:23,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:43:23,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:43:23,877 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:43:23,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917737735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:43:23,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:43:23,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-05 06:43:23,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049795990] [2021-06-05 06:43:23,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:43:23,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:43:23,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:43:23,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:43:23,878 INFO L87 Difference]: Start difference. First operand 20093 states and 78191 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:24,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:43:24,163 INFO L93 Difference]: Finished difference Result 29554 states and 110558 transitions. [2021-06-05 06:43:24,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 06:43:24,164 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:43:24,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:43:24,233 INFO L225 Difference]: With dead ends: 29554 [2021-06-05 06:43:24,233 INFO L226 Difference]: Without dead ends: 29537 [2021-06-05 06:43:24,233 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 107.6ms TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:43:24,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29537 states. [2021-06-05 06:43:24,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29537 to 20364. [2021-06-05 06:43:24,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20364 states, 20363 states have (on average 3.8971173206305556) internal successors, (79357), 20363 states have internal predecessors, (79357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:24,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20364 states to 20364 states and 79357 transitions. [2021-06-05 06:43:24,840 INFO L78 Accepts]: Start accepts. Automaton has 20364 states and 79357 transitions. Word has length 28 [2021-06-05 06:43:24,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:43:24,840 INFO L482 AbstractCegarLoop]: Abstraction has 20364 states and 79357 transitions. [2021-06-05 06:43:24,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:24,840 INFO L276 IsEmpty]: Start isEmpty. Operand 20364 states and 79357 transitions. [2021-06-05 06:43:24,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:43:24,870 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:43:24,870 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:43:25,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5862,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:43:25,070 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:43:25,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:43:25,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1026756543, now seen corresponding path program 121 times [2021-06-05 06:43:25,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:43:25,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725347910] [2021-06-05 06:43:25,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:43:25,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:43:25,097 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:43:25,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:43:25,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725347910] [2021-06-05 06:43:25,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725347910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:43:25,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414101676] [2021-06-05 06:43:25,098 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 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:43:25,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:43:25,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:43:25,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:43:25,177 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:43:25,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414101676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:43:25,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:43:25,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-05 06:43:25,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377141039] [2021-06-05 06:43:25,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:43:25,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:43:25,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:43:25,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:43:25,177 INFO L87 Difference]: Start difference. First operand 20364 states and 79357 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:25,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:43:25,456 INFO L93 Difference]: Finished difference Result 31323 states and 116077 transitions. [2021-06-05 06:43:25,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:43:25,457 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:43:25,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:43:25,530 INFO L225 Difference]: With dead ends: 31323 [2021-06-05 06:43:25,530 INFO L226 Difference]: Without dead ends: 31323 [2021-06-05 06:43:25,530 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 111.8ms TimeCoverageRelationStatistics Valid=135, Invalid=245, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:43:25,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31323 states. [2021-06-05 06:43:25,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31323 to 20033. [2021-06-05 06:43:25,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20033 states, 20032 states have (on average 3.8823382587859423) internal successors, (77771), 20032 states have internal predecessors, (77771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:25,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20033 states to 20033 states and 77771 transitions. [2021-06-05 06:43:25,979 INFO L78 Accepts]: Start accepts. Automaton has 20033 states and 77771 transitions. Word has length 28 [2021-06-05 06:43:25,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:43:25,979 INFO L482 AbstractCegarLoop]: Abstraction has 20033 states and 77771 transitions. [2021-06-05 06:43:25,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:25,979 INFO L276 IsEmpty]: Start isEmpty. Operand 20033 states and 77771 transitions. [2021-06-05 06:43:26,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:43:26,007 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:43:26,007 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:43:26,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5863,207 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:43:26,208 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:43:26,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:43:26,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1921529187, now seen corresponding path program 122 times [2021-06-05 06:43:26,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:43:26,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828459741] [2021-06-05 06:43:26,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:43:26,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:43:26,243 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:43:26,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:43:26,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828459741] [2021-06-05 06:43:26,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828459741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:43:26,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36527728] [2021-06-05 06:43:26,243 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 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:43:26,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:43:26,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:43:26,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:43:26,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:43:26,334 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:43:26,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36527728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:43:26,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:43:26,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 06:43:26,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991670657] [2021-06-05 06:43:26,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:43:26,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:43:26,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:43:26,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:43:26,335 INFO L87 Difference]: Start difference. First operand 20033 states and 77771 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:27,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:43:27,097 INFO L93 Difference]: Finished difference Result 29652 states and 110343 transitions. [2021-06-05 06:43:27,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 06:43:27,097 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:43:27,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:43:27,163 INFO L225 Difference]: With dead ends: 29652 [2021-06-05 06:43:27,163 INFO L226 Difference]: Without dead ends: 29652 [2021-06-05 06:43:27,164 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 392.7ms TimeCoverageRelationStatistics Valid=589, Invalid=1961, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 06:43:27,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29652 states. [2021-06-05 06:43:27,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29652 to 20077. [2021-06-05 06:43:27,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20077 states, 20076 states have (on average 3.881002191671648) internal successors, (77915), 20076 states have internal predecessors, (77915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:27,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20077 states to 20077 states and 77915 transitions. [2021-06-05 06:43:27,783 INFO L78 Accepts]: Start accepts. Automaton has 20077 states and 77915 transitions. Word has length 28 [2021-06-05 06:43:27,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:43:27,783 INFO L482 AbstractCegarLoop]: Abstraction has 20077 states and 77915 transitions. [2021-06-05 06:43:27,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:27,783 INFO L276 IsEmpty]: Start isEmpty. Operand 20077 states and 77915 transitions. [2021-06-05 06:43:27,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:43:27,813 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:43:27,813 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:43:28,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5864,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:43:28,013 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:43:28,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:43:28,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1588524015, now seen corresponding path program 123 times [2021-06-05 06:43:28,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:43:28,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507627724] [2021-06-05 06:43:28,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:43:28,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:43:28,051 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:43:28,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:43:28,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507627724] [2021-06-05 06:43:28,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507627724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:43:28,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173160599] [2021-06-05 06:43:28,051 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 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:43:28,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:43:28,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:43:28,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:43:28,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:43:28,153 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:43:28,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173160599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:43:28,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:43:28,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 06:43:28,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641779374] [2021-06-05 06:43:28,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:43:28,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:43:28,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:43:28,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:43:28,154 INFO L87 Difference]: Start difference. First operand 20077 states and 77915 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:29,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:43:29,236 INFO L93 Difference]: Finished difference Result 31294 states and 115097 transitions. [2021-06-05 06:43:29,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 06:43:29,236 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:43:29,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:43:29,309 INFO L225 Difference]: With dead ends: 31294 [2021-06-05 06:43:29,309 INFO L226 Difference]: Without dead ends: 31294 [2021-06-05 06:43:29,309 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1621 ImplicationChecksByTransitivity, 585.0ms TimeCoverageRelationStatistics Valid=928, Invalid=3494, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 06:43:29,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31294 states. [2021-06-05 06:43:29,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31294 to 20595. [2021-06-05 06:43:29,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20595 states, 20594 states have (on average 3.8609303680683693) internal successors, (79512), 20594 states have internal predecessors, (79512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:29,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20595 states to 20595 states and 79512 transitions. [2021-06-05 06:43:29,823 INFO L78 Accepts]: Start accepts. Automaton has 20595 states and 79512 transitions. Word has length 28 [2021-06-05 06:43:29,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:43:29,823 INFO L482 AbstractCegarLoop]: Abstraction has 20595 states and 79512 transitions. [2021-06-05 06:43:29,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:29,823 INFO L276 IsEmpty]: Start isEmpty. Operand 20595 states and 79512 transitions. [2021-06-05 06:43:29,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:43:29,853 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:43:29,853 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:43:30,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5865,209 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:43:30,054 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:43:30,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:43:30,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1633345157, now seen corresponding path program 124 times [2021-06-05 06:43:30,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:43:30,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703288248] [2021-06-05 06:43:30,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:43:30,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:43:30,089 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:43:30,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:43:30,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703288248] [2021-06-05 06:43:30,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703288248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:43:30,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978991418] [2021-06-05 06:43:30,090 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:43:30,112 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:43:30,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:43:30,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:43:30,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:43:30,178 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:43:30,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978991418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:43:30,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:43:30,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 06:43:30,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817469828] [2021-06-05 06:43:30,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:43:30,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:43:30,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:43:30,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:43:30,179 INFO L87 Difference]: Start difference. First operand 20595 states and 79512 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:31,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:43:31,037 INFO L93 Difference]: Finished difference Result 30356 states and 112645 transitions. [2021-06-05 06:43:31,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 06:43:31,038 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:43:31,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:43:31,119 INFO L225 Difference]: With dead ends: 30356 [2021-06-05 06:43:31,119 INFO L226 Difference]: Without dead ends: 30352 [2021-06-05 06:43:31,119 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1100 ImplicationChecksByTransitivity, 440.9ms TimeCoverageRelationStatistics Valid=736, Invalid=2570, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 06:43:31,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30352 states. [2021-06-05 06:43:31,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30352 to 20487. [2021-06-05 06:43:31,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20487 states, 20486 states have (on average 3.863711803182661) internal successors, (79152), 20486 states have internal predecessors, (79152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:31,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20487 states to 20487 states and 79152 transitions. [2021-06-05 06:43:31,607 INFO L78 Accepts]: Start accepts. Automaton has 20487 states and 79152 transitions. Word has length 28 [2021-06-05 06:43:31,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:43:31,607 INFO L482 AbstractCegarLoop]: Abstraction has 20487 states and 79152 transitions. [2021-06-05 06:43:31,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:31,607 INFO L276 IsEmpty]: Start isEmpty. Operand 20487 states and 79152 transitions. [2021-06-05 06:43:31,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:43:31,753 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:43:31,753 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:43:31,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5866,210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:43:31,954 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:43:31,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:43:31,954 INFO L82 PathProgramCache]: Analyzing trace with hash -767961219, now seen corresponding path program 125 times [2021-06-05 06:43:31,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:43:31,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993894996] [2021-06-05 06:43:31,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:43:31,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:43:31,982 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:43:31,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:43:31,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993894996] [2021-06-05 06:43:31,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993894996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:43:31,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230291764] [2021-06-05 06:43:31,982 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 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:43:32,005 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:43:32,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:43:32,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:43:32,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:43:32,054 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 06:43:32,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230291764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:43:32,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:43:32,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-06-05 06:43:32,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78565149] [2021-06-05 06:43:32,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 06:43:32,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:43:32,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 06:43:32,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 06:43:32,055 INFO L87 Difference]: Start difference. First operand 20487 states and 79152 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:32,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:43:32,290 INFO L93 Difference]: Finished difference Result 25467 states and 94990 transitions. [2021-06-05 06:43:32,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:43:32,290 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:43:32,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:43:32,343 INFO L225 Difference]: With dead ends: 25467 [2021-06-05 06:43:32,343 INFO L226 Difference]: Without dead ends: 25467 [2021-06-05 06:43:32,343 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 96.2ms TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:43:32,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25467 states. [2021-06-05 06:43:32,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25467 to 20797. [2021-06-05 06:43:32,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20797 states, 20796 states have (on average 3.854827851509906) internal successors, (80165), 20796 states have internal predecessors, (80165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:32,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20797 states to 20797 states and 80165 transitions. [2021-06-05 06:43:32,729 INFO L78 Accepts]: Start accepts. Automaton has 20797 states and 80165 transitions. Word has length 28 [2021-06-05 06:43:32,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:43:32,729 INFO L482 AbstractCegarLoop]: Abstraction has 20797 states and 80165 transitions. [2021-06-05 06:43:32,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:32,729 INFO L276 IsEmpty]: Start isEmpty. Operand 20797 states and 80165 transitions. [2021-06-05 06:43:32,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:43:32,758 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:43:32,758 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:43:32,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5867,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:43:32,958 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:43:32,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:43:32,959 INFO L82 PathProgramCache]: Analyzing trace with hash 162238525, now seen corresponding path program 126 times [2021-06-05 06:43:32,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:43:32,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985839605] [2021-06-05 06:43:32,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:43:32,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:43:32,994 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:43:32,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:43:32,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985839605] [2021-06-05 06:43:32,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985839605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:43:32,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872414327] [2021-06-05 06:43:32,994 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 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:43:33,017 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:43:33,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:43:33,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:43:33,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:43:33,077 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:43:33,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872414327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:43:33,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:43:33,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 06:43:33,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487146806] [2021-06-05 06:43:33,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:43:33,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:43:33,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:43:33,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:43:33,078 INFO L87 Difference]: Start difference. First operand 20797 states and 80165 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:33,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:43:33,903 INFO L93 Difference]: Finished difference Result 31245 states and 114624 transitions. [2021-06-05 06:43:33,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 06:43:33,903 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:43:33,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:43:33,970 INFO L225 Difference]: With dead ends: 31245 [2021-06-05 06:43:33,970 INFO L226 Difference]: Without dead ends: 31245 [2021-06-05 06:43:33,971 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 453.6ms TimeCoverageRelationStatistics Valid=684, Invalid=2396, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 06:43:34,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31245 states. [2021-06-05 06:43:34,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31245 to 22412. [2021-06-05 06:43:34,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22412 states, 22411 states have (on average 3.866538753290795) internal successors, (86653), 22411 states have internal predecessors, (86653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:34,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22412 states to 22412 states and 86653 transitions. [2021-06-05 06:43:34,486 INFO L78 Accepts]: Start accepts. Automaton has 22412 states and 86653 transitions. Word has length 28 [2021-06-05 06:43:34,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:43:34,486 INFO L482 AbstractCegarLoop]: Abstraction has 22412 states and 86653 transitions. [2021-06-05 06:43:34,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:34,486 INFO L276 IsEmpty]: Start isEmpty. Operand 22412 states and 86653 transitions. [2021-06-05 06:43:34,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:43:34,520 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:43:34,520 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:43:34,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5868,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:43:34,721 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:43:34,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:43:34,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1677533803, now seen corresponding path program 127 times [2021-06-05 06:43:34,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:43:34,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139591753] [2021-06-05 06:43:34,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:43:34,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:43:34,755 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:43:34,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:43:34,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139591753] [2021-06-05 06:43:34,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139591753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:43:34,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790845123] [2021-06-05 06:43:34,755 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 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:43:34,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:43:34,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:43:34,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:43:34,836 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:43:34,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790845123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:43:34,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:43:34,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 06:43:34,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20607523] [2021-06-05 06:43:34,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:43:34,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:43:34,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:43:34,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:43:34,836 INFO L87 Difference]: Start difference. First operand 22412 states and 86653 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:35,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:43:35,527 INFO L93 Difference]: Finished difference Result 29507 states and 110143 transitions. [2021-06-05 06:43:35,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 06:43:35,528 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:43:35,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:43:35,593 INFO L225 Difference]: With dead ends: 29507 [2021-06-05 06:43:35,593 INFO L226 Difference]: Without dead ends: 29495 [2021-06-05 06:43:35,594 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 352.5ms TimeCoverageRelationStatistics Valid=503, Invalid=1849, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 06:43:35,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29495 states. [2021-06-05 06:43:36,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29495 to 22542. [2021-06-05 06:43:36,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22542 states, 22541 states have (on average 3.861763009626902) internal successors, (87048), 22541 states have internal predecessors, (87048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:36,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22542 states to 22542 states and 87048 transitions. [2021-06-05 06:43:36,149 INFO L78 Accepts]: Start accepts. Automaton has 22542 states and 87048 transitions. Word has length 28 [2021-06-05 06:43:36,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:43:36,149 INFO L482 AbstractCegarLoop]: Abstraction has 22542 states and 87048 transitions. [2021-06-05 06:43:36,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:36,149 INFO L276 IsEmpty]: Start isEmpty. Operand 22542 states and 87048 transitions. [2021-06-05 06:43:36,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:43:36,182 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:43:36,182 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:43:36,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5869,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:43:36,383 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:43:36,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:43:36,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1986650177, now seen corresponding path program 128 times [2021-06-05 06:43:36,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:43:36,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950297990] [2021-06-05 06:43:36,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:43:36,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:43:36,410 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:43:36,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:43:36,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950297990] [2021-06-05 06:43:36,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950297990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:43:36,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244497420] [2021-06-05 06:43:36,411 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 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:43:36,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:43:36,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:43:36,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:43:36,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:43:36,481 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:43:36,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244497420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:43:36,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:43:36,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 06:43:36,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605378165] [2021-06-05 06:43:36,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 06:43:36,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:43:36,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 06:43:36,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 06:43:36,481 INFO L87 Difference]: Start difference. First operand 22542 states and 87048 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:36,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:43:36,719 INFO L93 Difference]: Finished difference Result 25801 states and 98005 transitions. [2021-06-05 06:43:36,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 06:43:36,720 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:43:36,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:43:36,781 INFO L225 Difference]: With dead ends: 25801 [2021-06-05 06:43:36,781 INFO L226 Difference]: Without dead ends: 25801 [2021-06-05 06:43:36,781 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 93.7ms TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:43:36,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25801 states. [2021-06-05 06:43:37,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25801 to 23345. [2021-06-05 06:43:37,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23345 states, 23344 states have (on average 3.8565370116518163) internal successors, (90027), 23344 states have internal predecessors, (90027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:37,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23345 states to 23345 states and 90027 transitions. [2021-06-05 06:43:37,235 INFO L78 Accepts]: Start accepts. Automaton has 23345 states and 90027 transitions. Word has length 28 [2021-06-05 06:43:37,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:43:37,235 INFO L482 AbstractCegarLoop]: Abstraction has 23345 states and 90027 transitions. [2021-06-05 06:43:37,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:37,235 INFO L276 IsEmpty]: Start isEmpty. Operand 23345 states and 90027 transitions. [2021-06-05 06:43:37,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:43:37,270 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:43:37,270 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:43:37,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5870 [2021-06-05 06:43:37,470 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:43:37,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:43:37,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1864655551, now seen corresponding path program 129 times [2021-06-05 06:43:37,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:43:37,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682295558] [2021-06-05 06:43:37,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:43:37,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:43:37,506 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:43:37,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:43:37,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682295558] [2021-06-05 06:43:37,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682295558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:43:37,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991189841] [2021-06-05 06:43:37,507 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 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:43:37,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:43:37,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:43:37,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:43:37,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:43:37,587 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:43:37,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991189841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:43:37,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:43:37,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 06:43:37,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674171201] [2021-06-05 06:43:37,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:43:37,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:43:37,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:43:37,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:43:37,588 INFO L87 Difference]: Start difference. First operand 23345 states and 90027 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:38,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:43:38,322 INFO L93 Difference]: Finished difference Result 31278 states and 115554 transitions. [2021-06-05 06:43:38,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 06:43:38,322 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:43:38,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:43:38,390 INFO L225 Difference]: With dead ends: 31278 [2021-06-05 06:43:38,390 INFO L226 Difference]: Without dead ends: 31278 [2021-06-05 06:43:38,391 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 393.3ms TimeCoverageRelationStatistics Valid=627, Invalid=2235, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 06:43:38,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31278 states. [2021-06-05 06:43:38,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31278 to 24529. [2021-06-05 06:43:38,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24529 states, 24528 states have (on average 3.8241601435094585) internal successors, (93799), 24528 states have internal predecessors, (93799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:39,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24529 states to 24529 states and 93799 transitions. [2021-06-05 06:43:39,101 INFO L78 Accepts]: Start accepts. Automaton has 24529 states and 93799 transitions. Word has length 28 [2021-06-05 06:43:39,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:43:39,101 INFO L482 AbstractCegarLoop]: Abstraction has 24529 states and 93799 transitions. [2021-06-05 06:43:39,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:39,101 INFO L276 IsEmpty]: Start isEmpty. Operand 24529 states and 93799 transitions. [2021-06-05 06:43:39,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:43:39,141 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:43:39,141 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:43:39,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 215 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5871 [2021-06-05 06:43:39,341 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:43:39,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:43:39,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1124562599, now seen corresponding path program 130 times [2021-06-05 06:43:39,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:43:39,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817572258] [2021-06-05 06:43:39,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:43:39,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:43:39,372 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:43:39,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:43:39,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817572258] [2021-06-05 06:43:39,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817572258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:43:39,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657442990] [2021-06-05 06:43:39,373 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 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:43:39,394 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:43:39,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:43:39,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:43:39,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:43:39,447 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:43:39,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657442990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:43:39,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:43:39,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 06:43:39,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296184289] [2021-06-05 06:43:39,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:43:39,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:43:39,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:43:39,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:43:39,448 INFO L87 Difference]: Start difference. First operand 24529 states and 93799 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:40,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:43:40,018 INFO L93 Difference]: Finished difference Result 30402 states and 113216 transitions. [2021-06-05 06:43:40,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 06:43:40,018 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:43:40,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:43:40,085 INFO L225 Difference]: With dead ends: 30402 [2021-06-05 06:43:40,085 INFO L226 Difference]: Without dead ends: 30394 [2021-06-05 06:43:40,086 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 279.4ms TimeCoverageRelationStatistics Valid=394, Invalid=1412, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 06:43:40,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30394 states. [2021-06-05 06:43:40,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30394 to 24351. [2021-06-05 06:43:40,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24351 states, 24350 states have (on average 3.830390143737166) internal successors, (93270), 24350 states have internal predecessors, (93270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:40,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24351 states to 24351 states and 93270 transitions. [2021-06-05 06:43:40,584 INFO L78 Accepts]: Start accepts. Automaton has 24351 states and 93270 transitions. Word has length 28 [2021-06-05 06:43:40,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:43:40,584 INFO L482 AbstractCegarLoop]: Abstraction has 24351 states and 93270 transitions. [2021-06-05 06:43:40,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:40,584 INFO L276 IsEmpty]: Start isEmpty. Operand 24351 states and 93270 transitions. [2021-06-05 06:43:40,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:43:40,617 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:43:40,617 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:43:40,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5872 [2021-06-05 06:43:40,818 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:43:40,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:43:40,818 INFO L82 PathProgramCache]: Analyzing trace with hash 325434329, now seen corresponding path program 131 times [2021-06-05 06:43:40,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:43:40,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529512627] [2021-06-05 06:43:40,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:43:40,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:43:40,848 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:43:40,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:43:40,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529512627] [2021-06-05 06:43:40,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529512627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:43:40,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893143610] [2021-06-05 06:43:40,848 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 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:43:40,870 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:43:40,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:43:40,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:43:40,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:43:40,927 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:43:40,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893143610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:43:40,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:43:40,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 06:43:40,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572735322] [2021-06-05 06:43:40,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:43:40,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:43:40,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:43:40,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:43:40,928 INFO L87 Difference]: Start difference. First operand 24351 states and 93270 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:41,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:43:41,644 INFO L93 Difference]: Finished difference Result 32206 states and 118699 transitions. [2021-06-05 06:43:41,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 06:43:41,644 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:43:41,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:43:41,713 INFO L225 Difference]: With dead ends: 32206 [2021-06-05 06:43:41,714 INFO L226 Difference]: Without dead ends: 32206 [2021-06-05 06:43:41,714 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 375.6ms TimeCoverageRelationStatistics Valid=566, Invalid=2086, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 06:43:41,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32206 states. [2021-06-05 06:43:42,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32206 to 25303. [2021-06-05 06:43:42,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25303 states, 25302 states have (on average 3.807287961425974) internal successors, (96332), 25302 states have internal predecessors, (96332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:42,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25303 states to 25303 states and 96332 transitions. [2021-06-05 06:43:42,265 INFO L78 Accepts]: Start accepts. Automaton has 25303 states and 96332 transitions. Word has length 28 [2021-06-05 06:43:42,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:43:42,265 INFO L482 AbstractCegarLoop]: Abstraction has 25303 states and 96332 transitions. [2021-06-05 06:43:42,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:42,265 INFO L276 IsEmpty]: Start isEmpty. Operand 25303 states and 96332 transitions. [2021-06-05 06:43:42,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:43:42,300 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:43:42,300 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:43:42,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5873,217 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:43:42,500 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:43:42,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:43:42,501 INFO L82 PathProgramCache]: Analyzing trace with hash -757588327, now seen corresponding path program 132 times [2021-06-05 06:43:42,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:43:42,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088693152] [2021-06-05 06:43:42,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:43:42,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:43:42,532 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:43:42,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:43:42,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088693152] [2021-06-05 06:43:42,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088693152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:43:42,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129590783] [2021-06-05 06:43:42,533 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 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:43:42,555 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:43:42,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:43:42,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:43:42,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:43:42,737 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:43:42,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129590783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:43:42,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:43:42,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-05 06:43:42,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771678241] [2021-06-05 06:43:42,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:43:42,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:43:42,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:43:42,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:43:42,738 INFO L87 Difference]: Start difference. First operand 25303 states and 96332 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:43,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:43:43,167 INFO L93 Difference]: Finished difference Result 30966 states and 116947 transitions. [2021-06-05 06:43:43,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 06:43:43,168 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:43:43,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:43:43,246 INFO L225 Difference]: With dead ends: 30966 [2021-06-05 06:43:43,246 INFO L226 Difference]: Without dead ends: 30953 [2021-06-05 06:43:43,246 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 130.3ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:43:43,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30953 states. [2021-06-05 06:43:43,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30953 to 29426. [2021-06-05 06:43:43,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29426 states, 29425 states have (on average 3.824231096006797) internal successors, (112528), 29425 states have internal predecessors, (112528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:43,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29426 states to 29426 states and 112528 transitions. [2021-06-05 06:43:43,923 INFO L78 Accepts]: Start accepts. Automaton has 29426 states and 112528 transitions. Word has length 28 [2021-06-05 06:43:43,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:43:43,923 INFO L482 AbstractCegarLoop]: Abstraction has 29426 states and 112528 transitions. [2021-06-05 06:43:43,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:43,923 INFO L276 IsEmpty]: Start isEmpty. Operand 29426 states and 112528 transitions. [2021-06-05 06:43:43,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:43:43,968 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:43:43,968 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:43:44,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5874,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:43:44,169 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:43:44,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:43:44,169 INFO L82 PathProgramCache]: Analyzing trace with hash 713489791, now seen corresponding path program 133 times [2021-06-05 06:43:44,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:43:44,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900880548] [2021-06-05 06:43:44,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:43:44,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:43:44,200 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:43:44,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:43:44,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900880548] [2021-06-05 06:43:44,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900880548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:43:44,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513988768] [2021-06-05 06:43:44,200 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 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:43:44,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:43:44,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:43:44,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:43:44,269 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:43:44,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513988768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:43:44,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:43:44,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-05 06:43:44,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946464736] [2021-06-05 06:43:44,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:43:44,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:43:44,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:43:44,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:43:44,269 INFO L87 Difference]: Start difference. First operand 29426 states and 112528 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:44,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:43:44,635 INFO L93 Difference]: Finished difference Result 32429 states and 121859 transitions. [2021-06-05 06:43:44,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 06:43:44,635 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:43:44,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:43:44,707 INFO L225 Difference]: With dead ends: 32429 [2021-06-05 06:43:44,707 INFO L226 Difference]: Without dead ends: 32429 [2021-06-05 06:43:44,707 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 126.5ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:43:44,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32429 states. [2021-06-05 06:43:45,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32429 to 29171. [2021-06-05 06:43:45,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29171 states, 29170 states have (on average 3.820671923208776) internal successors, (111449), 29170 states have internal predecessors, (111449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:45,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29171 states to 29171 states and 111449 transitions. [2021-06-05 06:43:45,291 INFO L78 Accepts]: Start accepts. Automaton has 29171 states and 111449 transitions. Word has length 28 [2021-06-05 06:43:45,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:43:45,292 INFO L482 AbstractCegarLoop]: Abstraction has 29171 states and 111449 transitions. [2021-06-05 06:43:45,292 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:45,292 INFO L276 IsEmpty]: Start isEmpty. Operand 29171 states and 111449 transitions. [2021-06-05 06:43:45,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:43:45,337 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:43:45,337 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:43:45,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5875 [2021-06-05 06:43:45,537 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:43:45,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:43:45,538 INFO L82 PathProgramCache]: Analyzing trace with hash 280613187, now seen corresponding path program 134 times [2021-06-05 06:43:45,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:43:45,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384097243] [2021-06-05 06:43:45,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:43:45,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:43:45,568 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:43:45,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:43:45,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384097243] [2021-06-05 06:43:45,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384097243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:43:45,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243333236] [2021-06-05 06:43:45,568 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 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:43:45,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:43:45,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:43:45,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:43:45,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:43:45,646 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:43:45,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243333236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:43:45,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:43:45,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 06:43:45,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090438907] [2021-06-05 06:43:45,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:43:45,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:43:45,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:43:45,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:43:45,646 INFO L87 Difference]: Start difference. First operand 29171 states and 111449 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:46,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:43:46,225 INFO L93 Difference]: Finished difference Result 35787 states and 133219 transitions. [2021-06-05 06:43:46,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 06:43:46,225 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:43:46,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:43:46,305 INFO L225 Difference]: With dead ends: 35787 [2021-06-05 06:43:46,305 INFO L226 Difference]: Without dead ends: 35779 [2021-06-05 06:43:46,305 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 254.5ms TimeCoverageRelationStatistics Valid=354, Invalid=1286, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 06:43:46,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35779 states. [2021-06-05 06:43:46,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35779 to 29137. [2021-06-05 06:43:46,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29137 states, 29136 states have (on average 3.82111477210324) internal successors, (111332), 29136 states have internal predecessors, (111332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:47,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29137 states to 29137 states and 111332 transitions. [2021-06-05 06:43:47,039 INFO L78 Accepts]: Start accepts. Automaton has 29137 states and 111332 transitions. Word has length 28 [2021-06-05 06:43:47,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:43:47,039 INFO L482 AbstractCegarLoop]: Abstraction has 29137 states and 111332 transitions. [2021-06-05 06:43:47,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:47,039 INFO L276 IsEmpty]: Start isEmpty. Operand 29137 states and 111332 transitions. [2021-06-05 06:43:47,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:43:47,084 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:43:47,084 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:43:47,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5876,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:43:47,284 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:43:47,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:43:47,285 INFO L82 PathProgramCache]: Analyzing trace with hash -615207629, now seen corresponding path program 135 times [2021-06-05 06:43:47,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:43:47,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640097259] [2021-06-05 06:43:47,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:43:47,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:43:47,317 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:43:47,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:43:47,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640097259] [2021-06-05 06:43:47,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640097259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:43:47,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256156481] [2021-06-05 06:43:47,317 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 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:43:47,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:43:47,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:43:47,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:43:47,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:43:47,387 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:43:47,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256156481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:43:47,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:43:47,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-05 06:43:47,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129116205] [2021-06-05 06:43:47,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:43:47,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:43:47,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:43:47,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:43:47,388 INFO L87 Difference]: Start difference. First operand 29137 states and 111332 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:47,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:43:47,830 INFO L93 Difference]: Finished difference Result 31983 states and 120794 transitions. [2021-06-05 06:43:47,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 06:43:47,830 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:43:47,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:43:47,901 INFO L225 Difference]: With dead ends: 31983 [2021-06-05 06:43:47,901 INFO L226 Difference]: Without dead ends: 31983 [2021-06-05 06:43:47,901 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 197.4ms TimeCoverageRelationStatistics Valid=221, Invalid=535, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:43:47,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31983 states. [2021-06-05 06:43:48,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31983 to 29669. [2021-06-05 06:43:48,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29669 states, 29668 states have (on average 3.8194687879196443) internal successors, (113316), 29668 states have internal predecessors, (113316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:48,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29669 states to 29669 states and 113316 transitions. [2021-06-05 06:43:48,728 INFO L78 Accepts]: Start accepts. Automaton has 29669 states and 113316 transitions. Word has length 28 [2021-06-05 06:43:48,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:43:48,728 INFO L482 AbstractCegarLoop]: Abstraction has 29669 states and 113316 transitions. [2021-06-05 06:43:48,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:48,728 INFO L276 IsEmpty]: Start isEmpty. Operand 29669 states and 113316 transitions. [2021-06-05 06:43:48,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:43:48,777 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:43:48,777 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:43:48,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5877,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:43:48,978 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:43:48,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:43:48,978 INFO L82 PathProgramCache]: Analyzing trace with hash 877949845, now seen corresponding path program 136 times [2021-06-05 06:43:48,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:43:48,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943386152] [2021-06-05 06:43:48,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:43:49,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:43:49,174 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:43:49,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:43:49,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943386152] [2021-06-05 06:43:49,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943386152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:43:49,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689747249] [2021-06-05 06:43:49,174 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:43:49,196 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:43:49,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:43:49,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:43:49,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:43:49,249 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:43:49,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689747249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:43:49,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:43:49,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 06:43:49,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407889493] [2021-06-05 06:43:49,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:43:49,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:43:49,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:43:49,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:43:49,250 INFO L87 Difference]: Start difference. First operand 29669 states and 113316 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:43:49,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:43:49,889 INFO L93 Difference]: Finished difference Result 36622 states and 136400 transitions. [2021-06-05 06:43:49,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 06:43:49,893 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:43:49,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:43:49,978 INFO L225 Difference]: With dead ends: 36622 [2021-06-05 06:43:49,978 INFO L226 Difference]: Without dead ends: 36598 [2021-06-05 06:43:49,978 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 272.4ms TimeCoverageRelationStatistics Valid=348, Invalid=1292, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 06:43:50,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36598 states. Received shutdown request... [2021-06-05 06:43:50,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5878,222 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:43:50,417 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 06:43:50,418 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 06:43:50,420 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 06:43:50,420 INFO L202 PluginConnector]: Adding new model dot-product.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 06:43:50 BasicIcfg [2021-06-05 06:43:50,420 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 06:43:50,421 INFO L168 Benchmark]: Toolchain (without parser) took 868231.19 ms. Allocated memory was 360.7 MB in the beginning and 3.8 GB in the end (delta: 3.5 GB). Free memory was 340.1 MB in the beginning and 3.4 GB in the end (delta: -3.1 GB). Peak memory consumption was 503.5 MB. Max. memory is 16.0 GB. [2021-06-05 06:43:50,421 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 360.7 MB. Free memory was 341.3 MB in the beginning and 341.3 MB in the end (delta: 76.6 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 06:43:50,421 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.57 ms. Allocated memory is still 360.7 MB. Free memory was 340.1 MB in the beginning and 338.6 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 06:43:50,421 INFO L168 Benchmark]: Boogie Preprocessor took 11.36 ms. Allocated memory is still 360.7 MB. Free memory was 338.6 MB in the beginning and 337.7 MB in the end (delta: 985.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 06:43:50,421 INFO L168 Benchmark]: RCFGBuilder took 263.28 ms. Allocated memory is still 360.7 MB. Free memory was 337.5 MB in the beginning and 324.5 MB in the end (delta: 13.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-06-05 06:43:50,421 INFO L168 Benchmark]: TraceAbstraction took 867929.20 ms. Allocated memory was 360.7 MB in the beginning and 3.8 GB in the end (delta: 3.5 GB). Free memory was 324.0 MB in the beginning and 3.4 GB in the end (delta: -3.1 GB). Peak memory consumption was 488.8 MB. Max. memory is 16.0 GB. [2021-06-05 06:43:50,421 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 360.7 MB. Free memory was 341.3 MB in the beginning and 341.3 MB in the end (delta: 76.6 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 20.57 ms. Allocated memory is still 360.7 MB. Free memory was 340.1 MB in the beginning and 338.6 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 11.36 ms. Allocated memory is still 360.7 MB. Free memory was 338.6 MB in the beginning and 337.7 MB in the end (delta: 985.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 263.28 ms. Allocated memory is still 360.7 MB. Free memory was 337.5 MB in the beginning and 324.5 MB in the end (delta: 13.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 867929.20 ms. Allocated memory was 360.7 MB in the beginning and 3.8 GB in the end (delta: 3.5 GB). Free memory was 324.0 MB in the beginning and 3.4 GB in the end (delta: -3.1 GB). Peak memory consumption was 488.8 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 61]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing MinimizeSevpa. - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing MinimizeSevpa. - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing MinimizeSevpa. - TimeoutResultAtElement [Line: 67]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 42 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 867819.4ms, OverallIterations: 224, TraceHistogramMax: 3, EmptinessCheckTime: 1870.9ms, AutomataDifference: 632678.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 28.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 10071 SDtfs, 55604 SDslu, 73384 SDs, 0 SdLazy, 122114 SolverSat, 9740 SolverUnsat, 252 SolverUnknown, 0 SolverNotchecked, 388052.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13780 GetRequests, 4636 SyntacticMatches, 279 SemanticMatches, 8865 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138173 ImplicationChecksByTransitivity, 300598.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=29669occurred in iteration=223, InterpolantAutomatonStates: 7747, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 28830.9ms AutomataMinimizationTime, 224 MinimizatonAttempts, 717638 StatesRemovedByMinimization, 223 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 851.6ms SsaConstructionTime, 1899.6ms SatisfiabilityAnalysisTime, 152130.4ms InterpolantComputationTime, 11762 NumberOfCodeBlocks, 11762 NumberOfCodeBlocksAsserted, 761 NumberOfCheckSat, 11317 ConstructedInterpolants, 128 QuantifiedInterpolants, 136588 SizeOfPredicates, 1147 NumberOfNonLiveVariables, 14851 ConjunctsInSsa, 3382 ConjunctsInUnsatCore, 445 InterpolantComputations, 3 PerfectInterpolantSequences, 755/3564 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