/usr/bin/java -Xmx8000000000 -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-Delay.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-5.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-8a14012e553caa636f65c1137831746b6d9875cd-8a14012 [2021-08-06 19:52:29,281 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-06 19:52:29,283 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-06 19:52:29,306 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-06 19:52:29,337 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-Delay.epf [2021-08-06 19:52:29,357 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-06 19:52:29,358 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-06 19:52:29,359 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-06 19:52:29,359 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-06 19:52:29,359 INFO L138 SettingsManager]: * Use SBE=true [2021-08-06 19:52:29,359 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-06 19:52:29,360 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-06 19:52:29,360 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-06 19:52:29,360 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-06 19:52:29,360 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-06 19:52:29,360 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-06 19:52:29,369 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-06 19:52:29,369 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-06 19:52:29,370 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-06 19:52:29,370 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-06 19:52:29,370 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-06 19:52:29,370 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-06 19:52:29,370 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-06 19:52:29,370 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-06 19:52:29,371 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-06 19:52:29,371 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-06 19:52:29,371 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 19:52:29,371 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-06 19:52:29,371 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-06 19:52:29,371 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-06 19:52:29,372 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-06 19:52:29,372 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-06 19:52:29,372 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-06 19:52:29,372 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-06 19:52:29,372 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-06 19:52:29,372 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-06 19:52:29,625 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-06 19:52:29,641 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-06 19:52:29,643 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-06 19:52:29,644 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-06 19:52:29,645 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-06 19:52:29,646 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-5.wvr.bpl [2021-08-06 19:52:29,646 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-5.wvr.bpl' [2021-08-06 19:52:29,685 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-06 19:52:29,686 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-06 19:52:29,687 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-06 19:52:29,687 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-06 19:52:29,687 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-06 19:52:29,697 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:52:29" (1/1) ... [2021-08-06 19:52:29,703 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:52:29" (1/1) ... [2021-08-06 19:52:29,710 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-06 19:52:29,711 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-06 19:52:29,711 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-06 19:52:29,711 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-06 19:52:29,718 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:52:29" (1/1) ... [2021-08-06 19:52:29,718 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:52:29" (1/1) ... [2021-08-06 19:52:29,720 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:52:29" (1/1) ... [2021-08-06 19:52:29,721 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:52:29" (1/1) ... [2021-08-06 19:52:29,724 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:52:29" (1/1) ... [2021-08-06 19:52:29,727 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:52:29" (1/1) ... [2021-08-06 19:52:29,728 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:52:29" (1/1) ... [2021-08-06 19:52:29,729 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-06 19:52:29,730 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-06 19:52:29,730 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-06 19:52:29,730 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-06 19:52:29,731 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:52:29" (1/1) ... [2021-08-06 19:52:29,738 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 19:52:29,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:52:29,762 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-06 19:52:29,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-06 19:52:29,807 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-06 19:52:29,807 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-06 19:52:29,808 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-06 19:52:29,808 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-06 19:52:29,808 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-06 19:52:29,808 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-06 19:52:29,808 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-06 19:52:29,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-06 19:52:29,808 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-06 19:52:29,808 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-06 19:52:29,808 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-06 19:52:29,808 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-06 19:52:29,809 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-06 19:52:29,986 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-06 19:52:29,987 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-06 19:52:29,988 INFO L202 PluginConnector]: Adding new model misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 07:52:29 BoogieIcfgContainer [2021-08-06 19:52:29,988 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-06 19:52:29,990 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-06 19:52:29,990 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-06 19:52:29,992 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-06 19:52:29,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:52:29" (1/2) ... [2021-08-06 19:52:29,993 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@784d4c3f and model type misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.08 07:52:29, skipping insertion in model container [2021-08-06 19:52:29,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 07:52:29" (2/2) ... [2021-08-06 19:52:29,994 INFO L111 eAbstractionObserver]: Analyzing ICFG misc-5.wvr.bpl [2021-08-06 19:52:30,013 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-06 19:52:30,013 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-06 19:52:30,013 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-06 19:52:30,013 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-06 19:52:30,073 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-08-06 19:52:30,123 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2021-08-06 19:52:30,132 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-06 19:52:30,132 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-06 19:52:30,306 INFO L276 IsEmpty]: Start isEmpty. Operand has 87 states, 58 states have (on average 2.1551724137931036) internal successors, (125), 86 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:52:30,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-06 19:52:30,313 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:52:30,313 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:52:30,314 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:52:30,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:52:30,322 INFO L82 PathProgramCache]: Analyzing trace with hash 698134228, now seen corresponding path program 1 times [2021-08-06 19:52:30,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:52:30,331 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936420785] [2021-08-06 19:52:30,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:52:30,332 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:52:30,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:52:30,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:52:30,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:52:30,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936420785] [2021-08-06 19:52:30,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936420785] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:52:30,467 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:52:30,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-06 19:52:30,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324551236] [2021-08-06 19:52:30,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 19:52:30,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:52:30,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 19:52:30,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 19:52:30,488 INFO L87 Difference]: Start difference. First operand has 87 states, 58 states have (on average 2.1551724137931036) internal successors, (125), 86 states have internal predecessors, (125), 0 states have call successors, (0), 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 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:52:30,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:52:30,530 INFO L93 Difference]: Finished difference Result 84 states and 111 transitions. [2021-08-06 19:52:30,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 19:52:30,532 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-06 19:52:30,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:52:30,539 INFO L225 Difference]: With dead ends: 84 [2021-08-06 19:52:30,540 INFO L226 Difference]: Without dead ends: 33 [2021-08-06 19:52:30,541 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 19:52:30,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-08-06 19:52:30,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-08-06 19:52:30,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.5) internal successors, (48), 32 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) [2021-08-06 19:52:30,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 48 transitions. [2021-08-06 19:52:30,572 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 48 transitions. Word has length 14 [2021-08-06 19:52:30,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:52:30,573 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 48 transitions. [2021-08-06 19:52:30,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:52:30,573 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 48 transitions. [2021-08-06 19:52:30,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-06 19:52:30,574 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:52:30,574 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:52:30,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-06 19:52:30,574 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:52:30,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:52:30,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1957352560, now seen corresponding path program 2 times [2021-08-06 19:52:30,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:52:30,576 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297027034] [2021-08-06 19:52:30,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:52:30,576 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:52:30,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:52:30,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:52:30,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:52:30,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297027034] [2021-08-06 19:52:30,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297027034] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:52:30,613 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:52:30,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 19:52:30,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837017832] [2021-08-06 19:52:30,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 19:52:30,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:52:30,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 19:52:30,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-06 19:52:30,615 INFO L87 Difference]: Start difference. First operand 33 states and 48 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:52:30,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:52:30,643 INFO L93 Difference]: Finished difference Result 50 states and 72 transitions. [2021-08-06 19:52:30,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-06 19:52:30,643 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-06 19:52:30,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:52:30,645 INFO L225 Difference]: With dead ends: 50 [2021-08-06 19:52:30,645 INFO L226 Difference]: Without dead ends: 43 [2021-08-06 19:52:30,646 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 19:52:30,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-08-06 19:52:30,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2021-08-06 19:52:30,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.5526315789473684) internal successors, (59), 38 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:52:30,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 59 transitions. [2021-08-06 19:52:30,651 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 59 transitions. Word has length 14 [2021-08-06 19:52:30,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:52:30,651 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 59 transitions. [2021-08-06 19:52:30,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:52:30,652 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 59 transitions. [2021-08-06 19:52:30,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 19:52:30,652 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:52:30,653 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:52:30,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-06 19:52:30,653 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:52:30,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:52:30,654 INFO L82 PathProgramCache]: Analyzing trace with hash 680453266, now seen corresponding path program 1 times [2021-08-06 19:52:30,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:52:30,654 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193192948] [2021-08-06 19:52:30,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:52:30,654 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:52:30,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:52:30,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:52:30,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:52:30,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193192948] [2021-08-06 19:52:30,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193192948] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:52:30,739 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:52:30,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-06 19:52:30,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316862805] [2021-08-06 19:52:30,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 19:52:30,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:52:30,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 19:52:30,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-06 19:52:30,740 INFO L87 Difference]: Start difference. First operand 39 states and 59 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:52:30,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:52:30,780 INFO L93 Difference]: Finished difference Result 60 states and 88 transitions. [2021-08-06 19:52:30,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 19:52:30,781 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-06 19:52:30,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:52:30,782 INFO L225 Difference]: With dead ends: 60 [2021-08-06 19:52:30,782 INFO L226 Difference]: Without dead ends: 53 [2021-08-06 19:52:30,782 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 43.3ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:52:30,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-08-06 19:52:30,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 45. [2021-08-06 19:52:30,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 44 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:52:30,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 71 transitions. [2021-08-06 19:52:30,787 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 71 transitions. Word has length 16 [2021-08-06 19:52:30,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:52:30,787 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 71 transitions. [2021-08-06 19:52:30,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:52:30,788 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 71 transitions. [2021-08-06 19:52:30,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 19:52:30,788 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:52:30,788 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:52:30,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-06 19:52:30,789 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:52:30,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:52:30,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1696053998, now seen corresponding path program 1 times [2021-08-06 19:52:30,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:52:30,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846062690] [2021-08-06 19:52:30,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:52:30,790 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:52:30,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:52:30,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:52:30,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:52:30,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846062690] [2021-08-06 19:52:30,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846062690] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:52:30,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100796549] [2021-08-06 19:52:30,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:52:30,859 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:52:30,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:52:30,861 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:52:30,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-06 19:52:30,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:52:30,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 19:52:30,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:52:31,074 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 31.3 percent of original size [2021-08-06 19:52:31,076 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 31.3 percent of original size [2021-08-06 19:52:31,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:52:31,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100796549] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:52:31,126 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:52:31,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-08-06 19:52:31,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923725544] [2021-08-06 19:52:31,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 19:52:31,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:52:31,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 19:52:31,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:52:31,128 INFO L87 Difference]: Start difference. First operand 45 states and 71 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:52:31,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:52:31,171 INFO L93 Difference]: Finished difference Result 64 states and 96 transitions. [2021-08-06 19:52:31,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 19:52:31,172 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-06 19:52:31,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:52:31,172 INFO L225 Difference]: With dead ends: 64 [2021-08-06 19:52:31,173 INFO L226 Difference]: Without dead ends: 57 [2021-08-06 19:52:31,173 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 41.4ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:52:31,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-08-06 19:52:31,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 48. [2021-08-06 19:52:31,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.574468085106383) internal successors, (74), 47 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:52:31,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 74 transitions. [2021-08-06 19:52:31,177 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 74 transitions. Word has length 16 [2021-08-06 19:52:31,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:52:31,177 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 74 transitions. [2021-08-06 19:52:31,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:52:31,178 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 74 transitions. [2021-08-06 19:52:31,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 19:52:31,178 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:52:31,178 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:52:31,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-06 19:52:31,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:52:31,403 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:52:31,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:52:31,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1581147412, now seen corresponding path program 2 times [2021-08-06 19:52:31,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:52:31,404 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325309277] [2021-08-06 19:52:31,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:52:31,404 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:52:31,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:52:31,444 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 19:52:31,445 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 19:52:31,460 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:52:31,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:52:31,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325309277] [2021-08-06 19:52:31,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325309277] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:52:31,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116662829] [2021-08-06 19:52:31,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:52:31,461 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:52:31,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:52:31,463 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:52:31,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-06 19:52:31,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:52:31,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:52:31,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 19:52:31,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:52:31,821 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:52:31,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116662829] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:52:31,821 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:52:31,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-08-06 19:52:31,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602557747] [2021-08-06 19:52:31,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 19:52:31,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:52:31,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 19:52:31,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:52:31,824 INFO L87 Difference]: Start difference. First operand 48 states and 74 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:52:31,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:52:31,905 INFO L93 Difference]: Finished difference Result 75 states and 113 transitions. [2021-08-06 19:52:31,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 19:52:31,905 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 19:52:31,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:52:31,906 INFO L225 Difference]: With dead ends: 75 [2021-08-06 19:52:31,906 INFO L226 Difference]: Without dead ends: 68 [2021-08-06 19:52:31,907 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 61.7ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:52:31,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-08-06 19:52:31,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 54. [2021-08-06 19:52:31,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.6226415094339623) internal successors, (86), 53 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:52:31,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 86 transitions. [2021-08-06 19:52:31,912 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 86 transitions. Word has length 18 [2021-08-06 19:52:31,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:52:31,912 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 86 transitions. [2021-08-06 19:52:31,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:52:31,912 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 86 transitions. [2021-08-06 19:52:31,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 19:52:31,913 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:52:31,913 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:52:31,937 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-08-06 19:52:32,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:52:32,135 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:52:32,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:52:32,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1768837712, now seen corresponding path program 1 times [2021-08-06 19:52:32,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:52:32,136 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363114775] [2021-08-06 19:52:32,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:52:32,137 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:52:32,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:52:32,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:52:32,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:52:32,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363114775] [2021-08-06 19:52:32,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363114775] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:52:32,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505394018] [2021-08-06 19:52:32,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:52:32,221 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:52:32,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:52:32,222 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:52:32,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-06 19:52:32,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:52:32,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 19:52:32,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:52:32,423 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 52.9 percent of original size [2021-08-06 19:52:32,431 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 52.9 percent of original size [2021-08-06 19:52:32,447 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 31.3 percent of original size [2021-08-06 19:52:32,451 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 31.3 percent of original size [2021-08-06 19:52:32,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:52:32,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505394018] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:52:32,497 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:52:32,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-08-06 19:52:32,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821192906] [2021-08-06 19:52:32,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 19:52:32,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:52:32,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 19:52:32,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:52:32,498 INFO L87 Difference]: Start difference. First operand 54 states and 86 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:52:32,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:52:32,584 INFO L93 Difference]: Finished difference Result 81 states and 124 transitions. [2021-08-06 19:52:32,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 19:52:32,584 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 19:52:32,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:52:32,587 INFO L225 Difference]: With dead ends: 81 [2021-08-06 19:52:32,587 INFO L226 Difference]: Without dead ends: 74 [2021-08-06 19:52:32,587 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 73.8ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:52:32,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-08-06 19:52:32,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 61. [2021-08-06 19:52:32,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.6166666666666667) internal successors, (97), 60 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:52:32,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 97 transitions. [2021-08-06 19:52:32,603 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 97 transitions. Word has length 18 [2021-08-06 19:52:32,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:52:32,603 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 97 transitions. [2021-08-06 19:52:32,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:52:32,604 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 97 transitions. [2021-08-06 19:52:32,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 19:52:32,604 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:52:32,604 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:52:32,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-06 19:52:32,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:52:32,805 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:52:32,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:52:32,806 INFO L82 PathProgramCache]: Analyzing trace with hash 303760916, now seen corresponding path program 2 times [2021-08-06 19:52:32,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:52:32,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791782448] [2021-08-06 19:52:32,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:52:32,806 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:52:32,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:52:32,847 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 19:52:32,848 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 19:52:32,862 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:52:32,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:52:32,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791782448] [2021-08-06 19:52:32,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791782448] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:52:32,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424465502] [2021-08-06 19:52:32,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:52:32,863 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:52:32,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:52:32,864 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:52:32,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-06 19:52:32,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:52:32,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:52:32,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 19:52:32,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:52:33,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:52:33,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424465502] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:52:33,199 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:52:33,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-08-06 19:52:33,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81034780] [2021-08-06 19:52:33,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 19:52:33,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:52:33,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 19:52:33,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:52:33,201 INFO L87 Difference]: Start difference. First operand 61 states and 97 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:52:33,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:52:33,266 INFO L93 Difference]: Finished difference Result 86 states and 133 transitions. [2021-08-06 19:52:33,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 19:52:33,267 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 19:52:33,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:52:33,269 INFO L225 Difference]: With dead ends: 86 [2021-08-06 19:52:33,269 INFO L226 Difference]: Without dead ends: 79 [2021-08-06 19:52:33,269 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 60.9ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:52:33,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-08-06 19:52:33,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 58. [2021-08-06 19:52:33,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.5789473684210527) internal successors, (90), 57 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:52:33,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 90 transitions. [2021-08-06 19:52:33,277 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 90 transitions. Word has length 18 [2021-08-06 19:52:33,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:52:33,278 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 90 transitions. [2021-08-06 19:52:33,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:52:33,278 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 90 transitions. [2021-08-06 19:52:33,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:52:33,281 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:52:33,281 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:52:33,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-06 19:52:33,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:52:33,502 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:52:33,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:52:33,502 INFO L82 PathProgramCache]: Analyzing trace with hash -435172074, now seen corresponding path program 3 times [2021-08-06 19:52:33,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:52:33,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341098261] [2021-08-06 19:52:33,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:52:33,502 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:52:33,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:52:33,565 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 19:52:33,566 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 19:52:33,585 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:52:33,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:52:33,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341098261] [2021-08-06 19:52:33,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341098261] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:52:33,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390747709] [2021-08-06 19:52:33,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:52:33,586 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:52:33,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:52:33,587 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:52:33,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-06 19:52:33,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 19:52:33,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:52:33,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 19:52:33,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:52:33,981 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:52:33,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390747709] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:52:33,982 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:52:33,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-08-06 19:52:33,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637742677] [2021-08-06 19:52:33,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:52:33,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:52:33,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:52:33,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:52:33,985 INFO L87 Difference]: Start difference. First operand 58 states and 90 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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) [2021-08-06 19:52:34,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:52:34,064 INFO L93 Difference]: Finished difference Result 92 states and 141 transitions. [2021-08-06 19:52:34,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 19:52:34,064 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:52:34,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:52:34,065 INFO L225 Difference]: With dead ends: 92 [2021-08-06 19:52:34,065 INFO L226 Difference]: Without dead ends: 85 [2021-08-06 19:52:34,065 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 106.0ms TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:52:34,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-08-06 19:52:34,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 67. [2021-08-06 19:52:34,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.6515151515151516) internal successors, (109), 66 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:52:34,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 109 transitions. [2021-08-06 19:52:34,084 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 109 transitions. Word has length 20 [2021-08-06 19:52:34,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:52:34,084 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 109 transitions. [2021-08-06 19:52:34,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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) [2021-08-06 19:52:34,085 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 109 transitions. [2021-08-06 19:52:34,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:52:34,085 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:52:34,085 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:52:34,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-06 19:52:34,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:52:34,301 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:52:34,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:52:34,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1483287958, now seen corresponding path program 2 times [2021-08-06 19:52:34,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:52:34,302 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942876494] [2021-08-06 19:52:34,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:52:34,302 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:52:34,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:52:34,344 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 19:52:34,345 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 19:52:34,355 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 19:52:34,355 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 19:52:34,371 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:52:34,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:52:34,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942876494] [2021-08-06 19:52:34,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942876494] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:52:34,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024919987] [2021-08-06 19:52:34,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:52:34,371 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:52:34,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:52:34,372 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:52:34,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-06 19:52:34,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:52:34,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:52:34,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 19:52:34,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:52:34,679 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 57.9 percent of original size [2021-08-06 19:52:34,684 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 57.9 percent of original size [2021-08-06 19:52:34,761 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:52:34,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024919987] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:52:34,761 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:52:34,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-08-06 19:52:34,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028406028] [2021-08-06 19:52:34,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:52:34,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:52:34,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:52:34,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:52:34,763 INFO L87 Difference]: Start difference. First operand 67 states and 109 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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) [2021-08-06 19:52:34,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:52:34,851 INFO L93 Difference]: Finished difference Result 99 states and 153 transitions. [2021-08-06 19:52:34,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 19:52:34,852 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:52:34,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:52:34,852 INFO L225 Difference]: With dead ends: 99 [2021-08-06 19:52:34,852 INFO L226 Difference]: Without dead ends: 92 [2021-08-06 19:52:34,853 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 104.6ms TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:52:34,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-08-06 19:52:34,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 64. [2021-08-06 19:52:34,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.619047619047619) internal successors, (102), 63 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:52:34,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 102 transitions. [2021-08-06 19:52:34,856 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 102 transitions. Word has length 20 [2021-08-06 19:52:34,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:52:34,856 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 102 transitions. [2021-08-06 19:52:34,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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) [2021-08-06 19:52:34,856 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 102 transitions. [2021-08-06 19:52:34,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:52:34,857 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:52:34,857 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:52:34,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-06 19:52:35,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:52:35,082 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:52:35,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:52:35,082 INFO L82 PathProgramCache]: Analyzing trace with hash -247481774, now seen corresponding path program 3 times [2021-08-06 19:52:35,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:52:35,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093187220] [2021-08-06 19:52:35,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:52:35,082 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:52:35,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:52:35,138 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 19:52:35,139 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 19:52:35,157 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:52:35,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:52:35,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093187220] [2021-08-06 19:52:35,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093187220] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:52:35,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921008233] [2021-08-06 19:52:35,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:52:35,158 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:52:35,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:52:35,164 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:52:35,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-06 19:52:35,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 19:52:35,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:52:35,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 19:52:35,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:52:35,447 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:52:35,451 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:52:35,581 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:52:35,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921008233] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:52:35,581 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:52:35,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-08-06 19:52:35,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523414888] [2021-08-06 19:52:35,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:52:35,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:52:35,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:52:35,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:52:35,583 INFO L87 Difference]: Start difference. First operand 64 states and 102 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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) [2021-08-06 19:52:35,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:52:35,663 INFO L93 Difference]: Finished difference Result 98 states and 152 transitions. [2021-08-06 19:52:35,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 19:52:35,663 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:52:35,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:52:35,664 INFO L225 Difference]: With dead ends: 98 [2021-08-06 19:52:35,664 INFO L226 Difference]: Without dead ends: 91 [2021-08-06 19:52:35,664 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 93.1ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:52:35,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-08-06 19:52:35,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 64. [2021-08-06 19:52:35,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.619047619047619) internal successors, (102), 63 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:52:35,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 102 transitions. [2021-08-06 19:52:35,667 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 102 transitions. Word has length 20 [2021-08-06 19:52:35,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:52:35,667 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 102 transitions. [2021-08-06 19:52:35,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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) [2021-08-06 19:52:35,667 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 102 transitions. [2021-08-06 19:52:35,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:52:35,668 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:52:35,668 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:52:35,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-06 19:52:35,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:52:35,881 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:52:35,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:52:35,881 INFO L82 PathProgramCache]: Analyzing trace with hash -453420206, now seen corresponding path program 4 times [2021-08-06 19:52:35,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:52:35,882 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666924061] [2021-08-06 19:52:35,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:52:35,882 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:52:35,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:52:35,936 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 19:52:35,937 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 19:52:35,950 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:52:35,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:52:35,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666924061] [2021-08-06 19:52:35,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666924061] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:52:35,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541674813] [2021-08-06 19:52:35,965 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:52:35,965 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:52:35,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:52:35,974 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:52:36,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-06 19:52:36,101 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:52:36,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:52:36,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 19:52:36,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:52:36,246 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 52.9 percent of original size [2021-08-06 19:52:36,249 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 52.9 percent of original size [2021-08-06 19:52:36,386 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:52:36,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541674813] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:52:36,386 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:52:36,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-08-06 19:52:36,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836808753] [2021-08-06 19:52:36,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:52:36,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:52:36,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:52:36,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:52:36,388 INFO L87 Difference]: Start difference. First operand 64 states and 102 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) [2021-08-06 19:52:36,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:52:36,492 INFO L93 Difference]: Finished difference Result 99 states and 153 transitions. [2021-08-06 19:52:36,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 19:52:36,493 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 20 [2021-08-06 19:52:36,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:52:36,494 INFO L225 Difference]: With dead ends: 99 [2021-08-06 19:52:36,494 INFO L226 Difference]: Without dead ends: 92 [2021-08-06 19:52:36,494 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 98.4ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:52:36,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-08-06 19:52:36,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 72. [2021-08-06 19:52:36,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.619718309859155) internal successors, (115), 71 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:52:36,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 115 transitions. [2021-08-06 19:52:36,497 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 115 transitions. Word has length 20 [2021-08-06 19:52:36,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:52:36,497 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 115 transitions. [2021-08-06 19:52:36,497 INFO L471 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) [2021-08-06 19:52:36,497 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 115 transitions. [2021-08-06 19:52:36,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:52:36,497 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:52:36,497 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:52:36,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-06 19:52:36,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-08-06 19:52:36,717 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:52:36,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:52:36,717 INFO L82 PathProgramCache]: Analyzing trace with hash -265729906, now seen corresponding path program 5 times [2021-08-06 19:52:36,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:52:36,718 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289861530] [2021-08-06 19:52:36,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:52:36,718 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:52:36,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:52:36,768 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 19:52:36,769 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 19:52:36,778 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 19:52:36,779 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 19:52:36,794 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:52:36,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:52:36,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289861530] [2021-08-06 19:52:36,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289861530] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:52:36,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740131454] [2021-08-06 19:52:36,795 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:52:36,795 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:52:36,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:52:36,796 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:52:36,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-06 19:52:36,934 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 19:52:36,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:52:36,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 19:52:36,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:52:37,143 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 57.9 percent of original size [2021-08-06 19:52:37,146 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 57.9 percent of original size [2021-08-06 19:52:37,231 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:52:37,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740131454] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:52:37,232 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:52:37,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-08-06 19:52:37,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751238614] [2021-08-06 19:52:37,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:52:37,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:52:37,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:52:37,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:52:37,233 INFO L87 Difference]: Start difference. First operand 72 states and 115 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) [2021-08-06 19:52:37,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:52:37,330 INFO L93 Difference]: Finished difference Result 107 states and 166 transitions. [2021-08-06 19:52:37,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 19:52:37,330 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 20 [2021-08-06 19:52:37,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:52:37,331 INFO L225 Difference]: With dead ends: 107 [2021-08-06 19:52:37,331 INFO L226 Difference]: Without dead ends: 100 [2021-08-06 19:52:37,331 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 118.0ms TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:52:37,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-08-06 19:52:37,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 77. [2021-08-06 19:52:37,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.618421052631579) internal successors, (123), 76 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:52:37,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 123 transitions. [2021-08-06 19:52:37,336 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 123 transitions. Word has length 20 [2021-08-06 19:52:37,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:52:37,336 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 123 transitions. [2021-08-06 19:52:37,336 INFO L471 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) [2021-08-06 19:52:37,336 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 123 transitions. [2021-08-06 19:52:37,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:52:37,337 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:52:37,338 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:52:37,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-06 19:52:37,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:52:37,552 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:52:37,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:52:37,552 INFO L82 PathProgramCache]: Analyzing trace with hash -2019455338, now seen corresponding path program 3 times [2021-08-06 19:52:37,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:52:37,552 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580327915] [2021-08-06 19:52:37,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:52:37,553 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:52:37,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:52:37,601 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 19:52:37,602 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 19:52:37,617 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:52:37,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:52:37,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580327915] [2021-08-06 19:52:37,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580327915] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:52:37,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391333884] [2021-08-06 19:52:37,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:52:37,617 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:52:37,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:52:37,618 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:52:37,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-06 19:52:37,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 19:52:37,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:52:37,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 19:52:37,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:52:38,034 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:52:38,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391333884] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:52:38,035 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:52:38,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-08-06 19:52:38,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671741119] [2021-08-06 19:52:38,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:52:38,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:52:38,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:52:38,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:52:38,036 INFO L87 Difference]: Start difference. First operand 77 states and 123 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) [2021-08-06 19:52:38,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:52:38,132 INFO L93 Difference]: Finished difference Result 99 states and 153 transitions. [2021-08-06 19:52:38,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 19:52:38,132 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 20 [2021-08-06 19:52:38,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:52:38,133 INFO L225 Difference]: With dead ends: 99 [2021-08-06 19:52:38,133 INFO L226 Difference]: Without dead ends: 92 [2021-08-06 19:52:38,133 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 109.2ms TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:52:38,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-08-06 19:52:38,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 68. [2021-08-06 19:52:38,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.5820895522388059) internal successors, (106), 67 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:52:38,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 106 transitions. [2021-08-06 19:52:38,135 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 106 transitions. Word has length 20 [2021-08-06 19:52:38,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:52:38,136 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 106 transitions. [2021-08-06 19:52:38,136 INFO L471 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) [2021-08-06 19:52:38,136 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 106 transitions. [2021-08-06 19:52:38,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 19:52:38,136 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:52:38,136 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:52:38,160 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-08-06 19:52:38,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-06 19:52:38,357 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:52:38,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:52:38,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1087947624, now seen corresponding path program 4 times [2021-08-06 19:52:38,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:52:38,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180724549] [2021-08-06 19:52:38,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:52:38,357 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:52:38,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:52:38,407 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 19:52:38,408 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 19:52:38,414 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 30.0 percent of original size [2021-08-06 19:52:38,415 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 30.0 percent of original size [2021-08-06 19:52:38,430 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:52:38,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:52:38,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180724549] [2021-08-06 19:52:38,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180724549] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:52:38,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356819268] [2021-08-06 19:52:38,431 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:52:38,431 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:52:38,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:52:38,432 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:52:38,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-06 19:52:38,618 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:52:38,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:52:38,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 19:52:38,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:52:39,012 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:52:39,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356819268] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:52:39,013 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:52:39,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-06 19:52:39,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355364688] [2021-08-06 19:52:39,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:52:39,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:52:39,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:52:39,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:52:39,014 INFO L87 Difference]: Start difference. First operand 68 states and 106 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) [2021-08-06 19:52:39,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:52:39,238 INFO L93 Difference]: Finished difference Result 157 states and 248 transitions. [2021-08-06 19:52:39,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 19:52:39,239 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 [2021-08-06 19:52:39,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:52:39,240 INFO L225 Difference]: With dead ends: 157 [2021-08-06 19:52:39,240 INFO L226 Difference]: Without dead ends: 138 [2021-08-06 19:52:39,240 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 221.2ms TimeCoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:52:39,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-08-06 19:52:39,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 90. [2021-08-06 19:52:39,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.696629213483146) internal successors, (151), 89 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:52:39,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 151 transitions. [2021-08-06 19:52:39,243 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 151 transitions. Word has length 22 [2021-08-06 19:52:39,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:52:39,243 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 151 transitions. [2021-08-06 19:52:39,243 INFO L471 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) [2021-08-06 19:52:39,243 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 151 transitions. [2021-08-06 19:52:39,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 19:52:39,244 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:52:39,244 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:52:39,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-06 19:52:39,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-06 19:52:39,468 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:52:39,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:52:39,468 INFO L82 PathProgramCache]: Analyzing trace with hash -900257324, now seen corresponding path program 6 times [2021-08-06 19:52:39,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:52:39,468 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441151642] [2021-08-06 19:52:39,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:52:39,468 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:52:39,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:52:39,519 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 77.8 percent of original size [2021-08-06 19:52:39,520 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 77.8 percent of original size [2021-08-06 19:52:39,539 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 19:52:39,540 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 19:52:39,553 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 19:52:39,554 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 19:52:39,571 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:52:39,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:52:39,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441151642] [2021-08-06 19:52:39,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441151642] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:52:39,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726852866] [2021-08-06 19:52:39,572 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:52:39,572 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:52:39,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:52:39,593 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:52:39,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-06 19:52:39,786 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 19:52:39,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:52:39,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:52:39,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:52:40,043 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 19:52:40,049 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 19:52:40,207 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:52:40,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726852866] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:52:40,207 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:52:40,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-06 19:52:40,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039535513] [2021-08-06 19:52:40,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:52:40,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:52:40,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:52:40,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:52:40,210 INFO L87 Difference]: Start difference. First operand 90 states and 151 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) [2021-08-06 19:52:40,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:52:40,342 INFO L93 Difference]: Finished difference Result 128 states and 205 transitions. [2021-08-06 19:52:40,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 19:52:40,343 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 22 [2021-08-06 19:52:40,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:52:40,344 INFO L225 Difference]: With dead ends: 128 [2021-08-06 19:52:40,344 INFO L226 Difference]: Without dead ends: 121 [2021-08-06 19:52:40,344 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 160.9ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:52:40,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-08-06 19:52:40,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 96. [2021-08-06 19:52:40,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.694736842105263) internal successors, (161), 95 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:52:40,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 161 transitions. [2021-08-06 19:52:40,347 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 161 transitions. Word has length 22 [2021-08-06 19:52:40,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:52:40,347 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 161 transitions. [2021-08-06 19:52:40,347 INFO L471 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) [2021-08-06 19:52:40,347 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 161 transitions. [2021-08-06 19:52:40,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 19:52:40,348 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:52:40,348 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:52:40,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-06 19:52:40,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-06 19:52:40,569 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:52:40,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:52:40,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1929633176, now seen corresponding path program 7 times [2021-08-06 19:52:40,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:52:40,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31504401] [2021-08-06 19:52:40,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:52:40,570 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:52:40,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:52:40,607 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 19:52:40,608 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 19:52:40,617 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 19:52:40,618 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 19:52:40,624 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 30.0 percent of original size [2021-08-06 19:52:40,625 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 30.0 percent of original size [2021-08-06 19:52:40,640 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:52:40,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:52:40,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31504401] [2021-08-06 19:52:40,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31504401] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:52:40,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009201585] [2021-08-06 19:52:40,641 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:52:40,641 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:52:40,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:52:40,644 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:52:40,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-06 19:52:40,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:52:40,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:52:40,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:52:41,054 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 57.9 percent of original size [2021-08-06 19:52:41,060 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 57.9 percent of original size [2021-08-06 19:52:41,235 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:52:41,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009201585] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:52:41,235 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:52:41,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-06 19:52:41,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917184369] [2021-08-06 19:52:41,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:52:41,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:52:41,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:52:41,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:52:41,237 INFO L87 Difference]: Start difference. First operand 96 states and 161 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) [2021-08-06 19:52:41,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:52:41,380 INFO L93 Difference]: Finished difference Result 161 states and 260 transitions. [2021-08-06 19:52:41,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 19:52:41,381 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 [2021-08-06 19:52:41,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:52:41,381 INFO L225 Difference]: With dead ends: 161 [2021-08-06 19:52:41,381 INFO L226 Difference]: Without dead ends: 150 [2021-08-06 19:52:41,382 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 145.5ms TimeCoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:52:41,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-08-06 19:52:41,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 90. [2021-08-06 19:52:41,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.696629213483146) internal successors, (151), 89 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:52:41,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 151 transitions. [2021-08-06 19:52:41,385 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 151 transitions. Word has length 22 [2021-08-06 19:52:41,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:52:41,385 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 151 transitions. [2021-08-06 19:52:41,385 INFO L471 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) [2021-08-06 19:52:41,385 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 151 transitions. [2021-08-06 19:52:41,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 19:52:41,385 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:52:41,385 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:52:41,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-06 19:52:41,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-06 19:52:41,586 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:52:41,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:52:41,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1444533292, now seen corresponding path program 8 times [2021-08-06 19:52:41,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:52:41,587 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197238377] [2021-08-06 19:52:41,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:52:41,587 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:52:41,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:52:41,651 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 19:52:41,652 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 19:52:41,667 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:52:41,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:52:41,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197238377] [2021-08-06 19:52:41,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197238377] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:52:41,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168439774] [2021-08-06 19:52:41,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:52:41,668 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:52:41,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:52:41,673 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:52:41,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-06 19:52:41,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:52:41,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:52:41,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:52:41,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:52:42,035 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 52.9 percent of original size [2021-08-06 19:52:42,037 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 52.9 percent of original size [2021-08-06 19:52:42,273 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:52:42,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168439774] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:52:42,273 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:52:42,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-06 19:52:42,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463184905] [2021-08-06 19:52:42,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:52:42,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:52:42,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:52:42,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:52:42,274 INFO L87 Difference]: Start difference. First operand 90 states and 151 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) [2021-08-06 19:52:42,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:52:42,411 INFO L93 Difference]: Finished difference Result 133 states and 215 transitions. [2021-08-06 19:52:42,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 19:52:42,412 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 22 [2021-08-06 19:52:42,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:52:42,412 INFO L225 Difference]: With dead ends: 133 [2021-08-06 19:52:42,413 INFO L226 Difference]: Without dead ends: 126 [2021-08-06 19:52:42,413 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 146.5ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:52:42,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-08-06 19:52:42,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 105. [2021-08-06 19:52:42,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.7307692307692308) internal successors, (180), 104 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:52:42,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 180 transitions. [2021-08-06 19:52:42,416 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 180 transitions. Word has length 22 [2021-08-06 19:52:42,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:52:42,416 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 180 transitions. [2021-08-06 19:52:42,416 INFO L471 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) [2021-08-06 19:52:42,416 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 180 transitions. [2021-08-06 19:52:42,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 19:52:42,416 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:52:42,416 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:52:42,436 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-08-06 19:52:42,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:52:42,625 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:52:42,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:52:42,625 INFO L82 PathProgramCache]: Analyzing trace with hash 473926740, now seen corresponding path program 9 times [2021-08-06 19:52:42,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:52:42,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468402636] [2021-08-06 19:52:42,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:52:42,625 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:52:42,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:52:42,674 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 19:52:42,674 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 19:52:42,680 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 30.0 percent of original size [2021-08-06 19:52:42,680 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 30.0 percent of original size [2021-08-06 19:52:42,695 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:52:42,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:52:42,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468402636] [2021-08-06 19:52:42,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468402636] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:52:42,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074200791] [2021-08-06 19:52:42,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:52:42,695 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:52:42,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:52:42,696 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:52:42,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-06 19:52:42,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 19:52:42,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:52:42,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:52:42,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:52:43,071 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:52:43,073 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:52:43,289 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:52:43,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074200791] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:52:43,290 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:52:43,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-06 19:52:43,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814141128] [2021-08-06 19:52:43,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:52:43,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:52:43,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:52:43,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:52:43,291 INFO L87 Difference]: Start difference. First operand 105 states and 180 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) [2021-08-06 19:52:43,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:52:43,457 INFO L93 Difference]: Finished difference Result 165 states and 269 transitions. [2021-08-06 19:52:43,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 19:52:43,457 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 22 [2021-08-06 19:52:43,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:52:43,458 INFO L225 Difference]: With dead ends: 165 [2021-08-06 19:52:43,458 INFO L226 Difference]: Without dead ends: 154 [2021-08-06 19:52:43,458 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 155.6ms TimeCoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2021-08-06 19:52:43,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-08-06 19:52:43,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 98. [2021-08-06 19:52:43,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.690721649484536) internal successors, (164), 97 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:52:43,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 164 transitions. [2021-08-06 19:52:43,462 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 164 transitions. Word has length 22 [2021-08-06 19:52:43,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:52:43,462 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 164 transitions. [2021-08-06 19:52:43,462 INFO L471 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) [2021-08-06 19:52:43,463 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 164 transitions. [2021-08-06 19:52:43,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 19:52:43,463 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:52:43,463 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:52:43,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-06 19:52:43,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-06 19:52:43,692 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:52:43,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:52:43,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1462781424, now seen corresponding path program 10 times [2021-08-06 19:52:43,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:52:43,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870546527] [2021-08-06 19:52:43,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:52:43,693 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:52:43,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:52:43,749 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 19:52:43,750 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 19:52:43,759 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 19:52:43,759 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 19:52:43,766 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 30.0 percent of original size [2021-08-06 19:52:43,767 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 30.0 percent of original size [2021-08-06 19:52:43,783 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:52:43,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:52:43,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870546527] [2021-08-06 19:52:43,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870546527] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:52:43,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315729837] [2021-08-06 19:52:43,783 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:52:43,783 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:52:43,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:52:43,784 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:52:43,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-06 19:52:44,078 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:52:44,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:52:44,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:52:44,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:52:44,254 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 57.9 percent of original size [2021-08-06 19:52:44,256 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 57.9 percent of original size [2021-08-06 19:52:44,425 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:52:44,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315729837] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:52:44,426 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:52:44,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-06 19:52:44,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515509503] [2021-08-06 19:52:44,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:52:44,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:52:44,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:52:44,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:52:44,427 INFO L87 Difference]: Start difference. First operand 98 states and 164 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) [2021-08-06 19:52:44,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:52:44,559 INFO L93 Difference]: Finished difference Result 157 states and 254 transitions. [2021-08-06 19:52:44,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 19:52:44,559 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 [2021-08-06 19:52:44,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:52:44,560 INFO L225 Difference]: With dead ends: 157 [2021-08-06 19:52:44,560 INFO L226 Difference]: Without dead ends: 150 [2021-08-06 19:52:44,560 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 152.1ms TimeCoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:52:44,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-08-06 19:52:44,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 105. [2021-08-06 19:52:44,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.6826923076923077) internal successors, (175), 104 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:52:44,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 175 transitions. [2021-08-06 19:52:44,563 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 175 transitions. Word has length 22 [2021-08-06 19:52:44,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:52:44,563 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 175 transitions. [2021-08-06 19:52:44,563 INFO L471 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) [2021-08-06 19:52:44,563 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 175 transitions. [2021-08-06 19:52:44,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 19:52:44,564 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:52:44,564 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:52:44,585 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-08-06 19:52:44,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:52:44,785 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:52:44,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:52:44,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1275091124, now seen corresponding path program 11 times [2021-08-06 19:52:44,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:52:44,785 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970867902] [2021-08-06 19:52:44,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:52:44,786 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:52:44,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:52:44,868 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 19:52:44,870 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 19:52:44,879 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 19:52:44,880 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 19:52:44,894 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:52:44,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:52:44,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970867902] [2021-08-06 19:52:44,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970867902] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:52:44,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533068582] [2021-08-06 19:52:44,894 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:52:44,894 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:52:44,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:52:44,895 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:52:44,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-06 19:52:45,202 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 19:52:45,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:52:45,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 19:52:45,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:52:45,324 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 91.9 percent of original size [2021-08-06 19:52:45,327 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 91.9 percent of original size [2021-08-06 19:52:45,444 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 57.9 percent of original size [2021-08-06 19:52:45,447 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 57.9 percent of original size [2021-08-06 19:52:45,517 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:52:45,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533068582] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:52:45,518 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:52:45,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-06 19:52:45,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618227300] [2021-08-06 19:52:45,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:52:45,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:52:45,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:52:45,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:52:45,520 INFO L87 Difference]: Start difference. First operand 105 states and 175 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) [2021-08-06 19:52:45,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:52:45,621 INFO L93 Difference]: Finished difference Result 141 states and 228 transitions. [2021-08-06 19:52:45,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 19:52:45,621 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 [2021-08-06 19:52:45,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:52:45,622 INFO L225 Difference]: With dead ends: 141 [2021-08-06 19:52:45,622 INFO L226 Difference]: Without dead ends: 134 [2021-08-06 19:52:45,622 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 134.0ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:52:45,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-08-06 19:52:45,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 110. [2021-08-06 19:52:45,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.688073394495413) internal successors, (184), 109 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:52:45,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 184 transitions. [2021-08-06 19:52:45,625 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 184 transitions. Word has length 22 [2021-08-06 19:52:45,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:52:45,625 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 184 transitions. [2021-08-06 19:52:45,625 INFO L471 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) [2021-08-06 19:52:45,625 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 184 transitions. [2021-08-06 19:52:45,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 19:52:45,626 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:52:45,626 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:52:45,645 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-08-06 19:52:45,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:52:45,833 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:52:45,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:52:45,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1247281512, now seen corresponding path program 4 times [2021-08-06 19:52:45,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:52:45,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630631129] [2021-08-06 19:52:45,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:52:45,834 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:52:45,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:52:45,880 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 19:52:45,881 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 19:52:45,886 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 30.0 percent of original size [2021-08-06 19:52:45,886 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 30.0 percent of original size [2021-08-06 19:52:45,901 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:52:45,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:52:45,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630631129] [2021-08-06 19:52:45,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630631129] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:52:45,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407156422] [2021-08-06 19:52:45,901 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:52:45,901 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:52:45,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:52:45,902 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:52:45,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-06 19:52:46,225 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:52:46,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:52:46,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 19:52:46,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:52:46,580 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:52:46,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407156422] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:52:46,581 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:52:46,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-06 19:52:46,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892527981] [2021-08-06 19:52:46,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:52:46,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:52:46,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:52:46,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:52:46,582 INFO L87 Difference]: Start difference. First operand 110 states and 184 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) [2021-08-06 19:52:46,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:52:46,761 INFO L93 Difference]: Finished difference Result 173 states and 281 transitions. [2021-08-06 19:52:46,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 19:52:46,761 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 [2021-08-06 19:52:46,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:52:46,763 INFO L225 Difference]: With dead ends: 173 [2021-08-06 19:52:46,763 INFO L226 Difference]: Without dead ends: 158 [2021-08-06 19:52:46,763 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 197.9ms TimeCoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:52:46,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-08-06 19:52:46,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 122. [2021-08-06 19:52:46,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.677685950413223) internal successors, (203), 121 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:52:46,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 203 transitions. [2021-08-06 19:52:46,771 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 203 transitions. Word has length 22 [2021-08-06 19:52:46,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:52:46,772 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 203 transitions. [2021-08-06 19:52:46,772 INFO L471 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) [2021-08-06 19:52:46,772 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 203 transitions. [2021-08-06 19:52:46,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 19:52:46,772 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:52:46,772 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:52:46,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-06 19:52:46,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:52:46,977 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:52:46,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:52:46,977 INFO L82 PathProgramCache]: Analyzing trace with hash 578434074, now seen corresponding path program 12 times [2021-08-06 19:52:46,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:52:46,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93418506] [2021-08-06 19:52:46,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:52:46,978 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:52:46,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:52:47,028 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 78.9 percent of original size [2021-08-06 19:52:47,030 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 78.9 percent of original size [2021-08-06 19:52:47,047 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 19:52:47,048 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 19:52:47,058 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 50.0 percent of original size [2021-08-06 19:52:47,059 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 50.0 percent of original size [2021-08-06 19:52:47,070 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 30.0 percent of original size [2021-08-06 19:52:47,071 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 30.0 percent of original size [2021-08-06 19:52:47,094 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:52:47,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:52:47,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93418506] [2021-08-06 19:52:47,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93418506] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:52:47,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286660212] [2021-08-06 19:52:47,094 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:52:47,094 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:52:47,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:52:47,097 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:52:47,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-06 19:52:47,472 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 19:52:47,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:52:47,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 19:52:47,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:52:47,863 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 61.0 percent of original size [2021-08-06 19:52:47,866 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 61.0 percent of original size [2021-08-06 19:52:47,945 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:52:47,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286660212] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:52:47,945 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:52:47,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-06 19:52:47,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343933067] [2021-08-06 19:52:47,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:52:47,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:52:47,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:52:47,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:52:47,946 INFO L87 Difference]: Start difference. First operand 122 states and 203 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) 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) [2021-08-06 19:52:48,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:52:48,148 INFO L93 Difference]: Finished difference Result 198 states and 317 transitions. [2021-08-06 19:52:48,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 19:52:48,150 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) 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 24 [2021-08-06 19:52:48,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:52:48,150 INFO L225 Difference]: With dead ends: 198 [2021-08-06 19:52:48,150 INFO L226 Difference]: Without dead ends: 187 [2021-08-06 19:52:48,151 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 270.1ms TimeCoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2021-08-06 19:52:48,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-08-06 19:52:48,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 129. [2021-08-06 19:52:48,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.7109375) internal successors, (219), 128 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:52:48,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 219 transitions. [2021-08-06 19:52:48,154 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 219 transitions. Word has length 24 [2021-08-06 19:52:48,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:52:48,154 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 219 transitions. [2021-08-06 19:52:48,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.7333333333333334) 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) [2021-08-06 19:52:48,155 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 219 transitions. [2021-08-06 19:52:48,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 19:52:48,155 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:52:48,155 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:52:48,181 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-08-06 19:52:48,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:52:48,369 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:52:48,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:52:48,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1152335658, now seen corresponding path program 13 times [2021-08-06 19:52:48,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:52:48,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99161425] [2021-08-06 19:52:48,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:52:48,369 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:52:48,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:52:48,416 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 78.9 percent of original size [2021-08-06 19:52:48,417 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 78.9 percent of original size [2021-08-06 19:52:48,432 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 19:52:48,433 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 19:52:48,441 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 19:52:48,442 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 19:52:48,448 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 30.0 percent of original size [2021-08-06 19:52:48,448 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 30.0 percent of original size [2021-08-06 19:52:48,463 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:52:48,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:52:48,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99161425] [2021-08-06 19:52:48,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99161425] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:52:48,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828650264] [2021-08-06 19:52:48,464 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:52:48,464 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:52:48,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:52:48,465 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:52:48,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-06 19:52:48,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:52:48,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 19:52:48,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:52:49,119 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 19:52:49,122 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 19:52:49,260 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:52:49,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828650264] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:52:49,261 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:52:49,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-06 19:52:49,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746663770] [2021-08-06 19:52:49,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:52:49,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:52:49,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:52:49,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:52:49,262 INFO L87 Difference]: Start difference. First operand 129 states and 219 transitions. Second operand has 15 states, 15 states have (on average 2.6) 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) [2021-08-06 19:52:49,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:52:49,487 INFO L93 Difference]: Finished difference Result 208 states and 336 transitions. [2021-08-06 19:52:49,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 19:52:49,487 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) 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 24 [2021-08-06 19:52:49,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:52:49,488 INFO L225 Difference]: With dead ends: 208 [2021-08-06 19:52:49,488 INFO L226 Difference]: Without dead ends: 197 [2021-08-06 19:52:49,488 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 237.2ms TimeCoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2021-08-06 19:52:49,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-08-06 19:52:49,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 129. [2021-08-06 19:52:49,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.7109375) internal successors, (219), 128 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:52:49,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 219 transitions. [2021-08-06 19:52:49,492 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 219 transitions. Word has length 24 [2021-08-06 19:52:49,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:52:49,492 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 219 transitions. [2021-08-06 19:52:49,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6) 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) [2021-08-06 19:52:49,492 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 219 transitions. [2021-08-06 19:52:49,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 19:52:49,493 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:52:49,493 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:52:49,513 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-08-06 19:52:49,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-08-06 19:52:49,705 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:52:49,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:52:49,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1358274090, now seen corresponding path program 14 times [2021-08-06 19:52:49,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:52:49,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204802863] [2021-08-06 19:52:49,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:52:49,705 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:52:49,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:52:49,763 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 77.8 percent of original size [2021-08-06 19:52:49,764 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 77.8 percent of original size [2021-08-06 19:52:49,780 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 19:52:49,781 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 19:52:49,795 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 19:52:49,796 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 19:52:49,803 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 30.0 percent of original size [2021-08-06 19:52:49,803 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 30.0 percent of original size [2021-08-06 19:52:49,819 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:52:49,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:52:49,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204802863] [2021-08-06 19:52:49,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204802863] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:52:49,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989981930] [2021-08-06 19:52:49,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:52:49,819 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:52:49,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:52:49,820 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:52:49,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-06 19:52:50,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:52:50,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:52:50,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 19:52:50,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:52:50,435 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 19:52:50,438 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 19:52:50,678 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:52:50,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989981930] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:52:50,678 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:52:50,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-06 19:52:50,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105428159] [2021-08-06 19:52:50,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:52:50,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:52:50,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:52:50,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:52:50,679 INFO L87 Difference]: Start difference. First operand 129 states and 219 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) 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) [2021-08-06 19:52:50,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:52:50,954 INFO L93 Difference]: Finished difference Result 242 states and 396 transitions. [2021-08-06 19:52:50,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 19:52:50,955 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) 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 24 [2021-08-06 19:52:50,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:52:50,956 INFO L225 Difference]: With dead ends: 242 [2021-08-06 19:52:50,956 INFO L226 Difference]: Without dead ends: 223 [2021-08-06 19:52:50,956 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 268.8ms TimeCoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2021-08-06 19:52:50,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-08-06 19:52:50,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 152. [2021-08-06 19:52:50,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.7615894039735098) internal successors, (266), 151 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:52:50,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 266 transitions. [2021-08-06 19:52:50,962 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 266 transitions. Word has length 24 [2021-08-06 19:52:50,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:52:50,962 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 266 transitions. [2021-08-06 19:52:50,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.7333333333333334) 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) [2021-08-06 19:52:50,963 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 266 transitions. [2021-08-06 19:52:50,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 19:52:50,964 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:52:50,964 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:52:50,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-06 19:52:51,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-08-06 19:52:51,169 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:52:51,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:52:51,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1170583790, now seen corresponding path program 15 times [2021-08-06 19:52:51,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:52:51,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92955205] [2021-08-06 19:52:51,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:52:51,169 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:52:51,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:52:51,227 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 77.8 percent of original size [2021-08-06 19:52:51,228 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 77.8 percent of original size [2021-08-06 19:52:51,242 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 19:52:51,243 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 19:52:51,255 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 19:52:51,257 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 19:52:51,270 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 30.0 percent of original size [2021-08-06 19:52:51,271 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 30.0 percent of original size [2021-08-06 19:52:51,286 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:52:51,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:52:51,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92955205] [2021-08-06 19:52:51,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92955205] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:52:51,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375872993] [2021-08-06 19:52:51,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:52:51,286 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:52:51,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:52:51,287 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:52:51,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-06 19:52:51,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 19:52:51,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:52:51,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 19:52:51,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:52:51,936 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 19:52:51,939 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 19:52:52,261 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:52:52,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375872993] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:52:52,261 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:52:52,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-06 19:52:52,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916522179] [2021-08-06 19:52:52,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:52:52,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:52:52,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:52:52,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:52:52,262 INFO L87 Difference]: Start difference. First operand 152 states and 266 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) 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) [2021-08-06 19:52:52,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:52:52,505 INFO L93 Difference]: Finished difference Result 209 states and 339 transitions. [2021-08-06 19:52:52,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 19:52:52,505 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) 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 24 [2021-08-06 19:52:52,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:52:52,506 INFO L225 Difference]: With dead ends: 209 [2021-08-06 19:52:52,506 INFO L226 Difference]: Without dead ends: 202 [2021-08-06 19:52:52,506 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 264.2ms TimeCoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-08-06 19:52:52,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-08-06 19:52:52,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 158. [2021-08-06 19:52:52,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 1.7579617834394905) internal successors, (276), 157 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:52:52,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 276 transitions. [2021-08-06 19:52:52,510 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 276 transitions. Word has length 24 [2021-08-06 19:52:52,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:52:52,510 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 276 transitions. [2021-08-06 19:52:52,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.7333333333333334) 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) [2021-08-06 19:52:52,510 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 276 transitions. [2021-08-06 19:52:52,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 19:52:52,511 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:52:52,511 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:52:52,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-06 19:52:52,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:52:52,733 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:52:52,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:52:52,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1370658074, now seen corresponding path program 16 times [2021-08-06 19:52:52,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:52:52,733 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077772534] [2021-08-06 19:52:52,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:52:52,733 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:52:52,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:52:52,773 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 19:52:52,774 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 19:52:52,782 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 19:52:52,783 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 19:52:52,791 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 61.1 percent of original size [2021-08-06 19:52:52,793 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 61.1 percent of original size [2021-08-06 19:52:52,808 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 30.0 percent of original size [2021-08-06 19:52:52,809 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 30.0 percent of original size [2021-08-06 19:52:52,823 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:52:52,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:52:52,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077772534] [2021-08-06 19:52:52,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077772534] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:52:52,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983939243] [2021-08-06 19:52:52,824 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:52:52,824 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:52:52,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:52:52,825 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:52:52,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-06 19:52:53,298 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:52:53,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:52:53,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 19:52:53,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:52:53,456 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 57.9 percent of original size [2021-08-06 19:52:53,458 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 57.9 percent of original size [2021-08-06 19:52:53,710 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:52:53,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983939243] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:52:53,710 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:52:53,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-06 19:52:53,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510249569] [2021-08-06 19:52:53,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:52:53,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:52:53,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:52:53,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:52:53,712 INFO L87 Difference]: Start difference. First operand 158 states and 276 transitions. Second operand has 15 states, 15 states have (on average 2.6) 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) [2021-08-06 19:52:53,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:52:53,967 INFO L93 Difference]: Finished difference Result 227 states and 380 transitions. [2021-08-06 19:52:53,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:52:53,968 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) 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 24 [2021-08-06 19:52:53,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:52:53,968 INFO L225 Difference]: With dead ends: 227 [2021-08-06 19:52:53,968 INFO L226 Difference]: Without dead ends: 216 [2021-08-06 19:52:53,969 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 274.9ms TimeCoverageRelationStatistics Valid=158, Invalid=544, Unknown=0, NotChecked=0, Total=702 [2021-08-06 19:52:53,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-08-06 19:52:53,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 166. [2021-08-06 19:52:53,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.7515151515151515) internal successors, (289), 165 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:52:53,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 289 transitions. [2021-08-06 19:52:53,973 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 289 transitions. Word has length 24 [2021-08-06 19:52:53,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:52:53,973 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 289 transitions. [2021-08-06 19:52:53,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6) 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) [2021-08-06 19:52:53,973 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 289 transitions. [2021-08-06 19:52:53,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 19:52:53,974 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:52:53,974 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:52:53,996 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-08-06 19:52:54,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:52:54,189 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:52:54,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:52:54,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1696611626, now seen corresponding path program 17 times [2021-08-06 19:52:54,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:52:54,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707068495] [2021-08-06 19:52:54,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:52:54,189 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:52:54,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:52:54,263 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 19:52:54,264 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 19:52:54,277 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 19:52:54,277 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 19:52:54,284 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 30.0 percent of original size [2021-08-06 19:52:54,284 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 30.0 percent of original size [2021-08-06 19:52:54,300 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:52:54,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:52:54,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707068495] [2021-08-06 19:52:54,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707068495] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:52:54,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477862772] [2021-08-06 19:52:54,301 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:52:54,301 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:52:54,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:52:54,301 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:52:54,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-06 19:52:54,791 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 19:52:54,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:52:54,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 19:52:54,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:52:54,924 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:52:54,926 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:52:55,201 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:52:55,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477862772] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:52:55,201 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:52:55,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-06 19:52:55,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106867280] [2021-08-06 19:52:55,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:52:55,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:52:55,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:52:55,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:52:55,202 INFO L87 Difference]: Start difference. First operand 166 states and 289 transitions. Second operand has 15 states, 15 states have (on average 2.6) 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) [2021-08-06 19:52:55,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:52:55,443 INFO L93 Difference]: Finished difference Result 257 states and 431 transitions. [2021-08-06 19:52:55,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 19:52:55,443 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) 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 24 [2021-08-06 19:52:55,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:52:55,444 INFO L225 Difference]: With dead ends: 257 [2021-08-06 19:52:55,444 INFO L226 Difference]: Without dead ends: 238 [2021-08-06 19:52:55,445 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 257.4ms TimeCoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2021-08-06 19:52:55,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-08-06 19:52:55,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 167. [2021-08-06 19:52:55,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.7530120481927711) internal successors, (291), 166 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:52:55,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 291 transitions. [2021-08-06 19:52:55,449 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 291 transitions. Word has length 24 [2021-08-06 19:52:55,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:52:55,449 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 291 transitions. [2021-08-06 19:52:55,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6) 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) [2021-08-06 19:52:55,449 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 291 transitions. [2021-08-06 19:52:55,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 19:52:55,450 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:52:55,450 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:52:55,470 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-08-06 19:52:55,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-06 19:52:55,661 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:52:55,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:52:55,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1508921326, now seen corresponding path program 18 times [2021-08-06 19:52:55,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:52:55,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664694833] [2021-08-06 19:52:55,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:52:55,661 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:52:55,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:52:55,707 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 19:52:55,709 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 19:52:55,722 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 19:52:55,724 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 19:52:55,737 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 30.0 percent of original size [2021-08-06 19:52:55,737 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 30.0 percent of original size [2021-08-06 19:52:55,753 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:52:55,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:52:55,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664694833] [2021-08-06 19:52:55,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664694833] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:52:55,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504209908] [2021-08-06 19:52:55,753 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:52:55,753 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:52:55,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:52:55,754 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:52:55,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-06 19:52:56,283 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 19:52:56,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:52:56,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 19:52:56,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:52:56,403 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:52:56,405 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:52:56,767 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:52:56,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504209908] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:52:56,767 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:52:56,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-06 19:52:56,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326209646] [2021-08-06 19:52:56,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:52:56,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:52:56,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:52:56,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:52:56,768 INFO L87 Difference]: Start difference. First operand 167 states and 291 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) 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) [2021-08-06 19:52:56,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:52:56,967 INFO L93 Difference]: Finished difference Result 228 states and 378 transitions. [2021-08-06 19:52:56,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 19:52:56,967 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) 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 24 [2021-08-06 19:52:56,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:52:56,968 INFO L225 Difference]: With dead ends: 228 [2021-08-06 19:52:56,968 INFO L226 Difference]: Without dead ends: 221 [2021-08-06 19:52:56,969 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 225.4ms TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:52:56,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-08-06 19:52:56,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 163. [2021-08-06 19:52:56,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.7407407407407407) internal successors, (282), 162 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:52:56,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 282 transitions. [2021-08-06 19:52:56,972 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 282 transitions. Word has length 24 [2021-08-06 19:52:56,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:52:56,972 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 282 transitions. [2021-08-06 19:52:56,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.7333333333333334) 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) [2021-08-06 19:52:56,973 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 282 transitions. [2021-08-06 19:52:56,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 19:52:56,973 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:52:56,973 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:52:57,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-06 19:52:57,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-06 19:52:57,197 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:52:57,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:52:57,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1714859758, now seen corresponding path program 19 times [2021-08-06 19:52:57,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:52:57,198 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085806610] [2021-08-06 19:52:57,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:52:57,198 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:52:57,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:52:57,249 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 19:52:57,249 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 19:52:57,258 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 61.1 percent of original size [2021-08-06 19:52:57,260 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 61.1 percent of original size [2021-08-06 19:52:57,272 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 30.0 percent of original size [2021-08-06 19:52:57,273 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 30.0 percent of original size [2021-08-06 19:52:57,288 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:52:57,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:52:57,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085806610] [2021-08-06 19:52:57,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085806610] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:52:57,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145154513] [2021-08-06 19:52:57,288 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:52:57,288 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:52:57,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:52:57,289 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:52:57,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-06 19:52:57,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:52:57,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 19:52:57,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:52:57,969 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:52:57,971 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:52:58,295 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:52:58,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145154513] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:52:58,295 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:52:58,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-06 19:52:58,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264119179] [2021-08-06 19:52:58,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:52:58,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:52:58,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:52:58,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:52:58,297 INFO L87 Difference]: Start difference. First operand 163 states and 282 transitions. Second operand has 15 states, 15 states have (on average 2.6) 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) [2021-08-06 19:52:58,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:52:58,591 INFO L93 Difference]: Finished difference Result 246 states and 412 transitions. [2021-08-06 19:52:58,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:52:58,592 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) 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 24 [2021-08-06 19:52:58,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:52:58,599 INFO L225 Difference]: With dead ends: 246 [2021-08-06 19:52:58,599 INFO L226 Difference]: Without dead ends: 239 [2021-08-06 19:52:58,600 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 313.3ms TimeCoverageRelationStatistics Valid=157, Invalid=545, Unknown=0, NotChecked=0, Total=702 [2021-08-06 19:52:58,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-08-06 19:52:58,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 162. [2021-08-06 19:52:58,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 1.7391304347826086) internal successors, (280), 161 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:52:58,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 280 transitions. [2021-08-06 19:52:58,604 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 280 transitions. Word has length 24 [2021-08-06 19:52:58,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:52:58,604 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 280 transitions. [2021-08-06 19:52:58,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6) 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) [2021-08-06 19:52:58,604 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 280 transitions. [2021-08-06 19:52:58,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 19:52:58,604 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:52:58,604 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:52:58,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-06 19:52:58,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-06 19:52:58,828 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:52:58,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:52:58,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1527169458, now seen corresponding path program 20 times [2021-08-06 19:52:58,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:52:58,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579797628] [2021-08-06 19:52:58,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:52:58,829 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:52:58,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:52:58,881 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 19:52:58,882 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 19:52:58,895 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 19:52:58,895 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 19:52:58,901 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 30.0 percent of original size [2021-08-06 19:52:58,902 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 30.0 percent of original size [2021-08-06 19:52:58,917 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:52:58,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:52:58,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579797628] [2021-08-06 19:52:58,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579797628] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:52:58,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304112998] [2021-08-06 19:52:58,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:52:58,918 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:52:58,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:52:58,919 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:52:58,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-06 19:52:59,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:52:59,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:52:59,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 19:52:59,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:52:59,604 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:52:59,606 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:52:59,896 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:52:59,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304112998] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:52:59,897 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:52:59,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-06 19:52:59,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265629178] [2021-08-06 19:52:59,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:52:59,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:52:59,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:52:59,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:52:59,898 INFO L87 Difference]: Start difference. First operand 162 states and 280 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) 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) [2021-08-06 19:53:00,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:53:00,053 INFO L93 Difference]: Finished difference Result 200 states and 339 transitions. [2021-08-06 19:53:00,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 19:53:00,053 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) 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 24 [2021-08-06 19:53:00,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:53:00,054 INFO L225 Difference]: With dead ends: 200 [2021-08-06 19:53:00,054 INFO L226 Difference]: Without dead ends: 193 [2021-08-06 19:53:00,055 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 191.1ms TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:53:00,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-08-06 19:53:00,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 160. [2021-08-06 19:53:00,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.7547169811320755) internal successors, (279), 159 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:53:00,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 279 transitions. [2021-08-06 19:53:00,059 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 279 transitions. Word has length 24 [2021-08-06 19:53:00,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:53:00,059 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 279 transitions. [2021-08-06 19:53:00,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.7333333333333334) 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) [2021-08-06 19:53:00,059 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 279 transitions. [2021-08-06 19:53:00,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 19:53:00,059 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:53:00,059 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:53:00,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-06 19:53:00,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:53:00,283 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:53:00,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:53:00,284 INFO L82 PathProgramCache]: Analyzing trace with hash -233778926, now seen corresponding path program 21 times [2021-08-06 19:53:00,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:53:00,284 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194883100] [2021-08-06 19:53:00,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:53:00,284 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:53:00,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:53:00,340 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 61.1 percent of original size [2021-08-06 19:53:00,342 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 61.1 percent of original size [2021-08-06 19:53:00,356 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 30.0 percent of original size [2021-08-06 19:53:00,357 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 30.0 percent of original size [2021-08-06 19:53:00,374 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:53:00,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:53:00,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194883100] [2021-08-06 19:53:00,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194883100] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:53:00,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487198792] [2021-08-06 19:53:00,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:53:00,374 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:53:00,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:53:00,381 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:53:00,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-06 19:53:01,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 19:53:01,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:53:01,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 19:53:01,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:53:01,103 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:53:01,105 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:53:01,457 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:53:01,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487198792] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:53:01,457 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:53:01,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-06 19:53:01,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165454898] [2021-08-06 19:53:01,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:53:01,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:53:01,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:53:01,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:53:01,458 INFO L87 Difference]: Start difference. First operand 160 states and 279 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) 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) [2021-08-06 19:53:01,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:53:01,628 INFO L93 Difference]: Finished difference Result 215 states and 361 transitions. [2021-08-06 19:53:01,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 19:53:01,628 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) 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 24 [2021-08-06 19:53:01,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:53:01,629 INFO L225 Difference]: With dead ends: 215 [2021-08-06 19:53:01,629 INFO L226 Difference]: Without dead ends: 208 [2021-08-06 19:53:01,629 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 226.4ms TimeCoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:53:01,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-08-06 19:53:01,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 166. [2021-08-06 19:53:01,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.7515151515151515) internal successors, (289), 165 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:53:01,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 289 transitions. [2021-08-06 19:53:01,633 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 289 transitions. Word has length 24 [2021-08-06 19:53:01,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:53:01,633 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 289 transitions. [2021-08-06 19:53:01,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.7333333333333334) 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) [2021-08-06 19:53:01,633 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 289 transitions. [2021-08-06 19:53:01,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 19:53:01,634 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:53:01,634 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:53:01,657 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-08-06 19:53:01,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:53:01,857 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:53:01,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:53:01,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1698855722, now seen corresponding path program 22 times [2021-08-06 19:53:01,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:53:01,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990870789] [2021-08-06 19:53:01,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:53:01,857 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:53:01,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:53:01,925 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 19:53:01,926 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 19:53:01,940 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 30.0 percent of original size [2021-08-06 19:53:01,941 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 30.0 percent of original size [2021-08-06 19:53:01,958 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:53:01,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:53:01,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990870789] [2021-08-06 19:53:01,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990870789] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:53:01,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587864912] [2021-08-06 19:53:01,959 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:53:01,959 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:53:01,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:53:01,960 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:53:01,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-06 19:53:02,645 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:53:02,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:53:02,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 19:53:02,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:53:02,767 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:53:02,769 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:53:03,064 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:53:03,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587864912] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:53:03,064 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:53:03,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-06 19:53:03,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003110040] [2021-08-06 19:53:03,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:53:03,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:53:03,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:53:03,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:53:03,065 INFO L87 Difference]: Start difference. First operand 166 states and 289 transitions. Second operand has 15 states, 15 states have (on average 2.6) 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) [2021-08-06 19:53:03,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:53:03,381 INFO L93 Difference]: Finished difference Result 283 states and 468 transitions. [2021-08-06 19:53:03,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:53:03,381 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) 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 24 [2021-08-06 19:53:03,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:53:03,382 INFO L225 Difference]: With dead ends: 283 [2021-08-06 19:53:03,382 INFO L226 Difference]: Without dead ends: 268 [2021-08-06 19:53:03,383 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 308.8ms TimeCoverageRelationStatistics Valid=160, Invalid=542, Unknown=0, NotChecked=0, Total=702 [2021-08-06 19:53:03,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-08-06 19:53:03,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 183. [2021-08-06 19:53:03,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 1.7307692307692308) internal successors, (315), 182 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:53:03,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 315 transitions. [2021-08-06 19:53:03,387 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 315 transitions. Word has length 24 [2021-08-06 19:53:03,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:53:03,387 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 315 transitions. [2021-08-06 19:53:03,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6) 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) [2021-08-06 19:53:03,387 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 315 transitions. [2021-08-06 19:53:03,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 19:53:03,388 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:53:03,388 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:53:03,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-06 19:53:03,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:53:03,601 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:53:03,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:53:03,601 INFO L82 PathProgramCache]: Analyzing trace with hash -439717358, now seen corresponding path program 23 times [2021-08-06 19:53:03,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:53:03,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318081433] [2021-08-06 19:53:03,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:53:03,602 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:53:03,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:53:03,665 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 19:53:03,667 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 19:53:03,680 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 30.0 percent of original size [2021-08-06 19:53:03,681 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 30.0 percent of original size [2021-08-06 19:53:03,696 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:53:03,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:53:03,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318081433] [2021-08-06 19:53:03,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318081433] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:53:03,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333262747] [2021-08-06 19:53:03,696 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:53:03,696 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:53:03,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:53:03,697 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:53:03,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-06 19:53:04,369 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 19:53:04,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:53:04,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 19:53:04,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:53:04,470 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:53:04,472 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:53:04,800 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:53:04,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333262747] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:53:04,801 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:53:04,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-06 19:53:04,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945095496] [2021-08-06 19:53:04,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:53:04,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:53:04,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:53:04,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:53:04,802 INFO L87 Difference]: Start difference. First operand 183 states and 315 transitions. Second operand has 15 states, 15 states have (on average 2.6) 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) [2021-08-06 19:53:05,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:53:05,042 INFO L93 Difference]: Finished difference Result 268 states and 443 transitions. [2021-08-06 19:53:05,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 19:53:05,043 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) 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 24 [2021-08-06 19:53:05,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:53:05,044 INFO L225 Difference]: With dead ends: 268 [2021-08-06 19:53:05,044 INFO L226 Difference]: Without dead ends: 253 [2021-08-06 19:53:05,044 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 260.4ms TimeCoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2021-08-06 19:53:05,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-08-06 19:53:05,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 194. [2021-08-06 19:53:05,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 1.761658031088083) internal successors, (340), 193 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:53:05,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 340 transitions. [2021-08-06 19:53:05,048 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 340 transitions. Word has length 24 [2021-08-06 19:53:05,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:53:05,048 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 340 transitions. [2021-08-06 19:53:05,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6) 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) [2021-08-06 19:53:05,048 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 340 transitions. [2021-08-06 19:53:05,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 19:53:05,048 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:53:05,048 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:53:05,066 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-08-06 19:53:05,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-08-06 19:53:05,249 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:53:05,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:53:05,249 INFO L82 PathProgramCache]: Analyzing trace with hash -252027058, now seen corresponding path program 24 times [2021-08-06 19:53:05,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:53:05,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680886564] [2021-08-06 19:53:05,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:53:05,250 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:53:05,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:53:05,304 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 19:53:05,305 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 19:53:05,311 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 30.0 percent of original size [2021-08-06 19:53:05,312 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 30.0 percent of original size [2021-08-06 19:53:05,336 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:53:05,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:53:05,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680886564] [2021-08-06 19:53:05,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680886564] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:53:05,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665354168] [2021-08-06 19:53:05,337 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:53:05,337 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:53:05,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:53:05,338 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:53:05,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-06 19:53:06,027 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 19:53:06,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:53:06,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 19:53:06,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:53:06,127 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:53:06,129 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:53:06,418 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:53:06,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665354168] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:53:06,418 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:53:06,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-06 19:53:06,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621881703] [2021-08-06 19:53:06,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:53:06,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:53:06,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:53:06,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:53:06,419 INFO L87 Difference]: Start difference. First operand 194 states and 340 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) 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) [2021-08-06 19:53:06,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:53:06,555 INFO L93 Difference]: Finished difference Result 234 states and 400 transitions. [2021-08-06 19:53:06,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 19:53:06,555 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) 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 24 [2021-08-06 19:53:06,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:53:06,556 INFO L225 Difference]: With dead ends: 234 [2021-08-06 19:53:06,556 INFO L226 Difference]: Without dead ends: 227 [2021-08-06 19:53:06,556 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 177.7ms TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:53:06,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-08-06 19:53:06,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 194. [2021-08-06 19:53:06,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 1.761658031088083) internal successors, (340), 193 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:53:06,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 340 transitions. [2021-08-06 19:53:06,560 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 340 transitions. Word has length 24 [2021-08-06 19:53:06,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:53:06,560 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 340 transitions. [2021-08-06 19:53:06,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.7333333333333334) 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) [2021-08-06 19:53:06,560 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 340 transitions. [2021-08-06 19:53:06,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 19:53:06,561 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:53:06,561 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:53:06,580 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-08-06 19:53:06,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:53:06,769 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:53:06,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:53:06,769 INFO L82 PathProgramCache]: Analyzing trace with hash -778054894, now seen corresponding path program 25 times [2021-08-06 19:53:06,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:53:06,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304507602] [2021-08-06 19:53:06,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:53:06,769 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:53:06,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:53:06,806 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 19:53:06,807 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 19:53:06,815 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 19:53:06,816 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 19:53:06,825 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 52.4 percent of original size [2021-08-06 19:53:06,826 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 52.4 percent of original size [2021-08-06 19:53:06,839 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 30.0 percent of original size [2021-08-06 19:53:06,839 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 30.0 percent of original size [2021-08-06 19:53:06,854 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:53:06,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:53:06,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304507602] [2021-08-06 19:53:06,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304507602] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:53:06,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363151544] [2021-08-06 19:53:06,854 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:53:06,854 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:53:06,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:53:06,855 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:53:06,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-06 19:53:07,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:53:07,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 19:53:07,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:53:07,737 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 57.9 percent of original size [2021-08-06 19:53:07,739 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 57.9 percent of original size [2021-08-06 19:53:07,970 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:53:07,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363151544] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:53:07,970 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:53:07,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-06 19:53:07,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068978612] [2021-08-06 19:53:07,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:53:07,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:53:07,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:53:07,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:53:07,971 INFO L87 Difference]: Start difference. First operand 194 states and 340 transitions. Second operand has 15 states, 15 states have (on average 2.6) 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) [2021-08-06 19:53:08,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:53:08,212 INFO L93 Difference]: Finished difference Result 256 states and 430 transitions. [2021-08-06 19:53:08,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:53:08,212 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) 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 24 [2021-08-06 19:53:08,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:53:08,213 INFO L225 Difference]: With dead ends: 256 [2021-08-06 19:53:08,213 INFO L226 Difference]: Without dead ends: 249 [2021-08-06 19:53:08,213 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 266.4ms TimeCoverageRelationStatistics Valid=158, Invalid=544, Unknown=0, NotChecked=0, Total=702 [2021-08-06 19:53:08,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-08-06 19:53:08,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 197. [2021-08-06 19:53:08,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.7704081632653061) internal successors, (347), 196 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:53:08,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 347 transitions. [2021-08-06 19:53:08,217 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 347 transitions. Word has length 24 [2021-08-06 19:53:08,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:53:08,217 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 347 transitions. [2021-08-06 19:53:08,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6) 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) [2021-08-06 19:53:08,217 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 347 transitions. [2021-08-06 19:53:08,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 19:53:08,218 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:53:08,218 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:53:08,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-08-06 19:53:08,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:53:08,436 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:53:08,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:53:08,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1140405138, now seen corresponding path program 26 times [2021-08-06 19:53:08,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:53:08,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548778436] [2021-08-06 19:53:08,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:53:08,436 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:53:08,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:53:08,475 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 77.8 percent of original size [2021-08-06 19:53:08,477 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 77.8 percent of original size [2021-08-06 19:53:08,493 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 19:53:08,494 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 19:53:08,507 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 52.4 percent of original size [2021-08-06 19:53:08,508 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 52.4 percent of original size [2021-08-06 19:53:08,521 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 30.0 percent of original size [2021-08-06 19:53:08,521 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 30.0 percent of original size [2021-08-06 19:53:08,536 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:53:08,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:53:08,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548778436] [2021-08-06 19:53:08,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548778436] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:53:08,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358882245] [2021-08-06 19:53:08,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:53:08,536 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:53:08,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:53:08,537 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:53:08,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-06 19:53:09,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:53:09,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:53:09,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 19:53:09,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:53:09,443 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 19:53:09,446 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 19:53:09,789 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:53:09,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358882245] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:53:09,790 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:53:09,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-06 19:53:09,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850506535] [2021-08-06 19:53:09,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:53:09,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:53:09,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:53:09,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:53:09,791 INFO L87 Difference]: Start difference. First operand 197 states and 347 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) 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) [2021-08-06 19:53:09,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:53:09,996 INFO L93 Difference]: Finished difference Result 258 states and 439 transitions. [2021-08-06 19:53:09,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 19:53:09,996 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) 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 24 [2021-08-06 19:53:09,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:53:09,997 INFO L225 Difference]: With dead ends: 258 [2021-08-06 19:53:09,997 INFO L226 Difference]: Without dead ends: 247 [2021-08-06 19:53:09,997 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 247.4ms TimeCoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-08-06 19:53:09,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-08-06 19:53:10,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 197. [2021-08-06 19:53:10,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.7704081632653061) internal successors, (347), 196 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:53:10,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 347 transitions. [2021-08-06 19:53:10,001 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 347 transitions. Word has length 24 [2021-08-06 19:53:10,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:53:10,001 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 347 transitions. [2021-08-06 19:53:10,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.7333333333333334) 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) [2021-08-06 19:53:10,001 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 347 transitions. [2021-08-06 19:53:10,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 19:53:10,002 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:53:10,002 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:53:10,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-08-06 19:53:10,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-08-06 19:53:10,213 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:53:10,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:53:10,213 INFO L82 PathProgramCache]: Analyzing trace with hash -590364594, now seen corresponding path program 27 times [2021-08-06 19:53:10,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:53:10,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130406296] [2021-08-06 19:53:10,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:53:10,213 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:53:10,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:53:10,267 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 77.8 percent of original size [2021-08-06 19:53:10,269 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 77.8 percent of original size [2021-08-06 19:53:10,284 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 19:53:10,286 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 19:53:10,299 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 19:53:10,299 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 19:53:10,306 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 30.0 percent of original size [2021-08-06 19:53:10,307 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 30.0 percent of original size [2021-08-06 19:53:10,324 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:53:10,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:53:10,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130406296] [2021-08-06 19:53:10,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130406296] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:53:10,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474053592] [2021-08-06 19:53:10,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:53:10,325 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:53:10,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:53:10,326 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:53:10,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-06 19:53:11,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 19:53:11,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:53:11,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 19:53:11,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:53:11,290 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 19:53:11,293 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 19:53:11,577 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:53:11,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474053592] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:53:11,577 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:53:11,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-06 19:53:11,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852429769] [2021-08-06 19:53:11,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:53:11,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:53:11,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:53:11,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:53:11,579 INFO L87 Difference]: Start difference. First operand 197 states and 347 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) 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) [2021-08-06 19:53:11,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:53:11,731 INFO L93 Difference]: Finished difference Result 238 states and 409 transitions. [2021-08-06 19:53:11,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 19:53:11,732 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) 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 24 [2021-08-06 19:53:11,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:53:11,732 INFO L225 Difference]: With dead ends: 238 [2021-08-06 19:53:11,732 INFO L226 Difference]: Without dead ends: 231 [2021-08-06 19:53:11,733 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 210.6ms TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:53:11,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-08-06 19:53:11,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 194. [2021-08-06 19:53:11,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 1.761658031088083) internal successors, (340), 193 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:53:11,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 340 transitions. [2021-08-06 19:53:11,736 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 340 transitions. Word has length 24 [2021-08-06 19:53:11,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:53:11,736 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 340 transitions. [2021-08-06 19:53:11,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.7333333333333334) 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) [2021-08-06 19:53:11,736 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 340 transitions. [2021-08-06 19:53:11,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 19:53:11,737 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:53:11,737 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:53:11,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-08-06 19:53:11,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-06 19:53:11,953 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:53:11,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:53:11,953 INFO L82 PathProgramCache]: Analyzing trace with hash -796303026, now seen corresponding path program 28 times [2021-08-06 19:53:11,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:53:11,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334630290] [2021-08-06 19:53:11,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:53:11,953 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:53:11,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:53:11,993 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 78.9 percent of original size [2021-08-06 19:53:11,995 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 78.9 percent of original size [2021-08-06 19:53:12,009 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 19:53:12,010 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 19:53:12,019 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 19:53:12,019 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 19:53:12,025 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 30.0 percent of original size [2021-08-06 19:53:12,025 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 30.0 percent of original size [2021-08-06 19:53:12,043 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:53:12,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:53:12,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334630290] [2021-08-06 19:53:12,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334630290] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:53:12,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354280653] [2021-08-06 19:53:12,043 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:53:12,043 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:53:12,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:53:12,044 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:53:12,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-06 19:53:12,847 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:53:12,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:53:12,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 19:53:12,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:53:13,118 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 57.9 percent of original size [2021-08-06 19:53:13,120 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 57.9 percent of original size [2021-08-06 19:53:13,257 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:53:13,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354280653] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:53:13,257 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:53:13,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-06 19:53:13,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144283691] [2021-08-06 19:53:13,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:53:13,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:53:13,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:53:13,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:53:13,258 INFO L87 Difference]: Start difference. First operand 194 states and 340 transitions. Second operand has 15 states, 15 states have (on average 2.6) 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) [2021-08-06 19:53:13,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:53:13,390 INFO L93 Difference]: Finished difference Result 225 states and 387 transitions. [2021-08-06 19:53:13,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 19:53:13,390 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) 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 24 [2021-08-06 19:53:13,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:53:13,391 INFO L225 Difference]: With dead ends: 225 [2021-08-06 19:53:13,391 INFO L226 Difference]: Without dead ends: 218 [2021-08-06 19:53:13,391 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 174.3ms TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:53:13,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-08-06 19:53:13,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 194. [2021-08-06 19:53:13,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 1.761658031088083) internal successors, (340), 193 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:53:13,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 340 transitions. [2021-08-06 19:53:13,394 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 340 transitions. Word has length 24 [2021-08-06 19:53:13,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:53:13,394 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 340 transitions. [2021-08-06 19:53:13,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6) 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) [2021-08-06 19:53:13,394 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 340 transitions. [2021-08-06 19:53:13,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 19:53:13,395 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:53:13,395 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:53:13,415 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-08-06 19:53:13,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-08-06 19:53:13,605 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:53:13,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:53:13,605 INFO L82 PathProgramCache]: Analyzing trace with hash -608612726, now seen corresponding path program 29 times [2021-08-06 19:53:13,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:53:13,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132179936] [2021-08-06 19:53:13,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:53:13,605 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:53:13,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:53:13,646 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 77.8 percent of original size [2021-08-06 19:53:13,648 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 77.8 percent of original size [2021-08-06 19:53:13,663 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 30.4 percent of original size [2021-08-06 19:53:13,664 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 30.4 percent of original size [2021-08-06 19:53:13,674 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 50.0 percent of original size [2021-08-06 19:53:13,675 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 50.0 percent of original size [2021-08-06 19:53:13,686 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 30.0 percent of original size [2021-08-06 19:53:13,686 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 30.0 percent of original size [2021-08-06 19:53:13,703 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:53:13,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:53:13,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132179936] [2021-08-06 19:53:13,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132179936] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:53:13,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917315072] [2021-08-06 19:53:13,703 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:53:13,703 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:53:13,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:53:13,704 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:53:13,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-06 19:53:14,561 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 19:53:14,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:53:14,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 19:53:14,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:53:14,886 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 61.0 percent of original size [2021-08-06 19:53:14,889 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 61.0 percent of original size [2021-08-06 19:53:14,960 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:53:14,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917315072] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:53:14,961 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:53:14,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-06 19:53:14,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89145879] [2021-08-06 19:53:14,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:53:14,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:53:14,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:53:14,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:53:14,962 INFO L87 Difference]: Start difference. First operand 194 states and 340 transitions. Second operand has 15 states, 15 states have (on average 2.6) 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) [2021-08-06 19:53:15,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:53:15,165 INFO L93 Difference]: Finished difference Result 261 states and 445 transitions. [2021-08-06 19:53:15,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 19:53:15,165 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) 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 24 [2021-08-06 19:53:15,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:53:15,166 INFO L225 Difference]: With dead ends: 261 [2021-08-06 19:53:15,166 INFO L226 Difference]: Without dead ends: 250 [2021-08-06 19:53:15,166 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 272.5ms TimeCoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2021-08-06 19:53:15,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-08-06 19:53:15,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 205. [2021-08-06 19:53:15,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.7450980392156863) internal successors, (356), 204 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:53:15,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 356 transitions. [2021-08-06 19:53:15,170 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 356 transitions. Word has length 24 [2021-08-06 19:53:15,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:53:15,170 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 356 transitions. [2021-08-06 19:53:15,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6) 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) [2021-08-06 19:53:15,170 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 356 transitions. [2021-08-06 19:53:15,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 19:53:15,171 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:53:15,171 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:53:15,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-08-06 19:53:15,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-06 19:53:15,381 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:53:15,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:53:15,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1413521240, now seen corresponding path program 30 times [2021-08-06 19:53:15,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:53:15,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531491602] [2021-08-06 19:53:15,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:53:15,381 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:53:15,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:53:15,449 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 28, result has 28.2 percent of original size [2021-08-06 19:53:15,451 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 28, result has 28.2 percent of original size [2021-08-06 19:53:15,467 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 47, result has 21.7 percent of original size [2021-08-06 19:53:15,469 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 47, result has 21.7 percent of original size [2021-08-06 19:53:15,484 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:53:15,485 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:53:15,503 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:53:15,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:53:15,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531491602] [2021-08-06 19:53:15,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531491602] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:53:15,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264429051] [2021-08-06 19:53:15,504 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:53:15,504 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:53:15,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:53:15,509 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:53:15,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-06 19:53:16,420 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 19:53:16,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:53:16,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 19:53:16,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:53:16,836 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 73.3 percent of original size [2021-08-06 19:53:16,840 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 73.3 percent of original size [2021-08-06 19:53:17,006 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:53:17,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264429051] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:53:17,006 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:53:17,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-06 19:53:17,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372621142] [2021-08-06 19:53:17,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 19:53:17,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:53:17,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 19:53:17,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:53:17,007 INFO L87 Difference]: Start difference. First operand 205 states and 356 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) [2021-08-06 19:53:17,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:53:17,612 INFO L93 Difference]: Finished difference Result 444 states and 733 transitions. [2021-08-06 19:53:17,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 19:53:17,618 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 [2021-08-06 19:53:17,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:53:17,619 INFO L225 Difference]: With dead ends: 444 [2021-08-06 19:53:17,619 INFO L226 Difference]: Without dead ends: 415 [2021-08-06 19:53:17,620 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 617.4ms TimeCoverageRelationStatistics Valid=328, Invalid=1004, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 19:53:17,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-08-06 19:53:17,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 273. [2021-08-06 19:53:17,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 1.7647058823529411) internal successors, (480), 272 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:53:17,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 480 transitions. [2021-08-06 19:53:17,625 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 480 transitions. Word has length 26 [2021-08-06 19:53:17,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:53:17,625 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 480 transitions. [2021-08-06 19:53:17,625 INFO L471 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) [2021-08-06 19:53:17,625 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 480 transitions. [2021-08-06 19:53:17,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 19:53:17,626 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:53:17,626 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:53:17,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-08-06 19:53:17,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-06 19:53:17,843 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:53:17,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:53:17,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1066497052, now seen corresponding path program 31 times [2021-08-06 19:53:17,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:53:17,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547618746] [2021-08-06 19:53:17,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:53:17,843 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:53:17,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:53:17,888 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 23, result has 23.3 percent of original size [2021-08-06 19:53:17,889 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 23, result has 23.3 percent of original size [2021-08-06 19:53:17,899 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 40.7 percent of original size [2021-08-06 19:53:17,900 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 40.7 percent of original size [2021-08-06 19:53:17,913 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 37, result has 22.9 percent of original size [2021-08-06 19:53:17,915 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 37, result has 22.9 percent of original size [2021-08-06 19:53:17,928 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 48.4 percent of original size [2021-08-06 19:53:17,930 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 48.4 percent of original size [2021-08-06 19:53:17,943 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:53:17,943 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:53:17,959 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:53:17,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:53:17,960 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547618746] [2021-08-06 19:53:17,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547618746] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:53:17,960 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581497265] [2021-08-06 19:53:17,960 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:53:17,960 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:53:17,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:53:17,961 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:53:17,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-06 19:53:18,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:53:18,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 19:53:18,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:53:19,079 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 57.9 percent of original size [2021-08-06 19:53:19,081 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 57.9 percent of original size [2021-08-06 19:53:19,444 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:53:19,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581497265] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:53:19,445 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:53:19,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-06 19:53:19,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879598546] [2021-08-06 19:53:19,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 19:53:19,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:53:19,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 19:53:19,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:53:19,446 INFO L87 Difference]: Start difference. First operand 273 states and 480 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) [2021-08-06 19:53:19,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:53:19,923 INFO L93 Difference]: Finished difference Result 406 states and 684 transitions. [2021-08-06 19:53:19,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 19:53:19,924 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 [2021-08-06 19:53:19,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:53:19,925 INFO L225 Difference]: With dead ends: 406 [2021-08-06 19:53:19,925 INFO L226 Difference]: Without dead ends: 391 [2021-08-06 19:53:19,926 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 512.2ms TimeCoverageRelationStatistics Valid=250, Invalid=806, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 19:53:19,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-08-06 19:53:19,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 290. [2021-08-06 19:53:19,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 1.7647058823529411) internal successors, (510), 289 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:53:19,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 510 transitions. [2021-08-06 19:53:19,931 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 510 transitions. Word has length 26 [2021-08-06 19:53:19,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:53:19,931 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 510 transitions. [2021-08-06 19:53:19,931 INFO L471 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) [2021-08-06 19:53:19,931 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 510 transitions. [2021-08-06 19:53:19,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 19:53:19,932 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:53:19,932 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:53:19,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-08-06 19:53:20,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-08-06 19:53:20,145 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:53:20,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:53:20,145 INFO L82 PathProgramCache]: Analyzing trace with hash -232119592, now seen corresponding path program 32 times [2021-08-06 19:53:20,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:53:20,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087518927] [2021-08-06 19:53:20,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:53:20,145 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:53:20,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:53:20,197 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 19:53:20,199 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 19:53:20,213 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 19:53:20,213 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 19:53:20,221 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 30.0 percent of original size [2021-08-06 19:53:20,221 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 30.0 percent of original size [2021-08-06 19:53:20,229 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:53:20,230 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:53:20,249 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:53:20,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:53:20,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087518927] [2021-08-06 19:53:20,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087518927] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:53:20,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245157325] [2021-08-06 19:53:20,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:53:20,250 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:53:20,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:53:20,251 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:53:20,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-06 19:53:21,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:53:21,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:53:21,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 19:53:21,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:53:21,344 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:53:21,346 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:53:21,719 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:53:21,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245157325] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:53:21,719 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:53:21,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-06 19:53:21,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44892114] [2021-08-06 19:53:21,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 19:53:21,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:53:21,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 19:53:21,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:53:21,720 INFO L87 Difference]: Start difference. First operand 290 states and 510 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) [2021-08-06 19:53:21,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:53:21,970 INFO L93 Difference]: Finished difference Result 394 states and 663 transitions. [2021-08-06 19:53:21,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 19:53:21,971 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 [2021-08-06 19:53:21,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:53:21,972 INFO L225 Difference]: With dead ends: 394 [2021-08-06 19:53:21,972 INFO L226 Difference]: Without dead ends: 383 [2021-08-06 19:53:21,972 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 301.5ms TimeCoverageRelationStatistics Valid=156, Invalid=546, Unknown=0, NotChecked=0, Total=702 [2021-08-06 19:53:21,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-08-06 19:53:21,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 294. [2021-08-06 19:53:21,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 1.7713310580204777) internal successors, (519), 293 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:53:21,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 519 transitions. [2021-08-06 19:53:21,976 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 519 transitions. Word has length 26 [2021-08-06 19:53:21,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:53:21,977 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 519 transitions. [2021-08-06 19:53:21,977 INFO L471 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) [2021-08-06 19:53:21,977 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 519 transitions. [2021-08-06 19:53:21,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 19:53:21,977 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:53:21,978 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:53:22,010 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-08-06 19:53:22,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-08-06 19:53:22,193 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:53:22,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:53:22,193 INFO L82 PathProgramCache]: Analyzing trace with hash 2126139540, now seen corresponding path program 33 times [2021-08-06 19:53:22,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:53:22,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113354329] [2021-08-06 19:53:22,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:53:22,193 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:53:22,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:53:22,251 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 36.7 percent of original size [2021-08-06 19:53:22,252 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 36.7 percent of original size [2021-08-06 19:53:22,266 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 59.0 percent of original size [2021-08-06 19:53:22,269 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 59.0 percent of original size [2021-08-06 19:53:22,288 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 30.0 percent of original size [2021-08-06 19:53:22,288 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 30.0 percent of original size [2021-08-06 19:53:22,296 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:53:22,296 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:53:22,313 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:53:22,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:53:22,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113354329] [2021-08-06 19:53:22,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113354329] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:53:22,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610729908] [2021-08-06 19:53:22,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:53:22,313 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:53:22,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:53:22,314 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:53:22,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-06 19:53:23,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 19:53:23,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:53:23,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 19:53:23,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:53:23,430 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:53:23,432 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:53:23,867 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:53:23,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610729908] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:53:23,867 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:53:23,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-06 19:53:23,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391880033] [2021-08-06 19:53:23,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 19:53:23,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:53:23,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 19:53:23,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:53:23,868 INFO L87 Difference]: Start difference. First operand 294 states and 519 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) [2021-08-06 19:53:24,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:53:24,133 INFO L93 Difference]: Finished difference Result 450 states and 764 transitions. [2021-08-06 19:53:24,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 19:53:24,133 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 [2021-08-06 19:53:24,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:53:24,134 INFO L225 Difference]: With dead ends: 450 [2021-08-06 19:53:24,134 INFO L226 Difference]: Without dead ends: 431 [2021-08-06 19:53:24,134 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 328.7ms TimeCoverageRelationStatistics Valid=174, Invalid=582, Unknown=0, NotChecked=0, Total=756 [2021-08-06 19:53:24,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-08-06 19:53:24,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 311. [2021-08-06 19:53:24,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 1.793548387096774) internal successors, (556), 310 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:53:24,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 556 transitions. [2021-08-06 19:53:24,140 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 556 transitions. Word has length 26 [2021-08-06 19:53:24,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:53:24,140 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 556 transitions. [2021-08-06 19:53:24,140 INFO L471 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) [2021-08-06 19:53:24,140 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 556 transitions. [2021-08-06 19:53:24,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 19:53:24,141 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:53:24,141 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:53:24,176 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-08-06 19:53:24,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-08-06 19:53:24,357 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:53:24,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:53:24,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1981137456, now seen corresponding path program 34 times [2021-08-06 19:53:24,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:53:24,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103308435] [2021-08-06 19:53:24,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:53:24,357 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:53:24,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:53:24,412 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 19:53:24,413 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 19:53:24,424 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 61.1 percent of original size [2021-08-06 19:53:24,425 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 61.1 percent of original size [2021-08-06 19:53:24,438 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 30.0 percent of original size [2021-08-06 19:53:24,439 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 30.0 percent of original size [2021-08-06 19:53:24,446 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:53:24,446 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:53:24,463 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:53:24,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:53:24,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103308435] [2021-08-06 19:53:24,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103308435] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:53:24,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799317216] [2021-08-06 19:53:24,463 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:53:24,463 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:53:24,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:53:24,464 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:53:24,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-06 19:53:25,493 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:53:25,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:53:25,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 19:53:25,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:53:25,602 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:53:25,604 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:53:26,116 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:53:26,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799317216] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:53:26,117 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:53:26,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-06 19:53:26,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118324982] [2021-08-06 19:53:26,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 19:53:26,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:53:26,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 19:53:26,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:53:26,118 INFO L87 Difference]: Start difference. First operand 311 states and 556 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) [2021-08-06 19:53:26,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:53:26,396 INFO L93 Difference]: Finished difference Result 446 states and 758 transitions. [2021-08-06 19:53:26,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 19:53:26,397 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 [2021-08-06 19:53:26,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:53:26,398 INFO L225 Difference]: With dead ends: 446 [2021-08-06 19:53:26,398 INFO L226 Difference]: Without dead ends: 431 [2021-08-06 19:53:26,398 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 330.6ms TimeCoverageRelationStatistics Valid=200, Invalid=670, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:53:26,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-08-06 19:53:26,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 337. [2021-08-06 19:53:26,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 1.7827380952380953) internal successors, (599), 336 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:53:26,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 599 transitions. [2021-08-06 19:53:26,404 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 599 transitions. Word has length 26 [2021-08-06 19:53:26,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:53:26,404 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 599 transitions. [2021-08-06 19:53:26,404 INFO L471 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) [2021-08-06 19:53:26,404 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 599 transitions. [2021-08-06 19:53:26,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 19:53:26,405 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:53:26,405 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:53:26,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-08-06 19:53:26,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:53:26,621 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:53:26,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:53:26,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1769553872, now seen corresponding path program 35 times [2021-08-06 19:53:26,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:53:26,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129906898] [2021-08-06 19:53:26,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:53:26,621 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:53:26,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:53:26,665 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 19:53:26,666 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 19:53:26,680 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 19:53:26,681 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 19:53:26,687 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 30.0 percent of original size [2021-08-06 19:53:26,688 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 30.0 percent of original size [2021-08-06 19:53:26,696 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:53:26,697 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:53:26,715 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:53:26,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:53:26,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129906898] [2021-08-06 19:53:26,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129906898] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:53:26,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314327494] [2021-08-06 19:53:26,716 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:53:26,716 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:53:26,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:53:26,717 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:53:26,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-06 19:53:27,863 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 19:53:27,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:53:27,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 19:53:27,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:53:27,973 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:53:27,975 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:53:28,386 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:53:28,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314327494] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:53:28,386 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:53:28,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-06 19:53:28,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782512753] [2021-08-06 19:53:28,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 19:53:28,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:53:28,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 19:53:28,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:53:28,387 INFO L87 Difference]: Start difference. First operand 337 states and 599 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) [2021-08-06 19:53:28,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:53:28,606 INFO L93 Difference]: Finished difference Result 432 states and 746 transitions. [2021-08-06 19:53:28,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 19:53:28,607 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 [2021-08-06 19:53:28,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:53:28,608 INFO L225 Difference]: With dead ends: 432 [2021-08-06 19:53:28,608 INFO L226 Difference]: Without dead ends: 417 [2021-08-06 19:53:28,608 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 284.0ms TimeCoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2021-08-06 19:53:28,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-08-06 19:53:28,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 337. [2021-08-06 19:53:28,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 1.7827380952380953) internal successors, (599), 336 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:53:28,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 599 transitions. [2021-08-06 19:53:28,615 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 599 transitions. Word has length 26 [2021-08-06 19:53:28,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:53:28,615 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 599 transitions. [2021-08-06 19:53:28,615 INFO L471 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) [2021-08-06 19:53:28,615 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 599 transitions. [2021-08-06 19:53:28,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 19:53:28,616 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:53:28,616 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:53:28,637 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-08-06 19:53:28,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:53:28,829 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:53:28,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:53:28,829 INFO L82 PathProgramCache]: Analyzing trace with hash -822660716, now seen corresponding path program 36 times [2021-08-06 19:53:28,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:53:28,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349132334] [2021-08-06 19:53:28,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:53:28,829 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:53:28,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:53:28,898 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 61.1 percent of original size [2021-08-06 19:53:28,899 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 61.1 percent of original size [2021-08-06 19:53:28,914 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 40, result has 7.0 percent of original size [2021-08-06 19:53:28,915 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 40, result has 7.0 percent of original size [2021-08-06 19:53:28,923 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:53:28,924 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:53:28,943 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:53:28,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:53:28,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349132334] [2021-08-06 19:53:28,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349132334] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:53:28,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927511799] [2021-08-06 19:53:28,943 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:53:28,943 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:53:28,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:53:28,945 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:53:28,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-06 19:53:30,032 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 19:53:30,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:53:30,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 19:53:30,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:53:30,144 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:53:30,146 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:53:30,613 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:53:30,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927511799] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:53:30,613 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:53:30,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-06 19:53:30,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596082617] [2021-08-06 19:53:30,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 19:53:30,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:53:30,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 19:53:30,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:53:30,614 INFO L87 Difference]: Start difference. First operand 337 states and 599 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) [2021-08-06 19:53:30,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:53:30,854 INFO L93 Difference]: Finished difference Result 459 states and 788 transitions. [2021-08-06 19:53:30,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 19:53:30,855 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 [2021-08-06 19:53:30,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:53:30,856 INFO L225 Difference]: With dead ends: 459 [2021-08-06 19:53:30,856 INFO L226 Difference]: Without dead ends: 440 [2021-08-06 19:53:30,856 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 321.9ms TimeCoverageRelationStatistics Valid=182, Invalid=574, Unknown=0, NotChecked=0, Total=756 [2021-08-06 19:53:30,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-08-06 19:53:30,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 344. [2021-08-06 19:53:30,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 1.7871720116618075) internal successors, (613), 343 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:53:30,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 613 transitions. [2021-08-06 19:53:30,861 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 613 transitions. Word has length 26 [2021-08-06 19:53:30,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:53:30,861 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 613 transitions. [2021-08-06 19:53:30,862 INFO L471 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) [2021-08-06 19:53:30,862 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 613 transitions. [2021-08-06 19:53:30,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 19:53:30,862 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:53:30,862 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:53:30,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-08-06 19:53:31,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-08-06 19:53:31,077 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:53:31,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:53:31,077 INFO L82 PathProgramCache]: Analyzing trace with hash 757461780, now seen corresponding path program 37 times [2021-08-06 19:53:31,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:53:31,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700243877] [2021-08-06 19:53:31,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:53:31,077 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:53:31,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:53:31,129 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 53.8 percent of original size [2021-08-06 19:53:31,130 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 53.8 percent of original size [2021-08-06 19:53:31,148 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 54.3 percent of original size [2021-08-06 19:53:31,150 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 54.3 percent of original size [2021-08-06 19:53:31,173 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 37, result has 7.5 percent of original size [2021-08-06 19:53:31,174 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 37, result has 7.5 percent of original size [2021-08-06 19:53:31,182 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:53:31,183 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:53:31,202 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:53:31,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:53:31,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700243877] [2021-08-06 19:53:31,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700243877] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:53:31,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458412740] [2021-08-06 19:53:31,202 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:53:31,203 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:53:31,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:53:31,203 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:53:31,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-06 19:53:32,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:53:32,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 19:53:32,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:53:32,489 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:53:32,492 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:53:33,020 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:53:33,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458412740] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:53:33,020 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:53:33,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-06 19:53:33,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729648686] [2021-08-06 19:53:33,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 19:53:33,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:53:33,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 19:53:33,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:53:33,021 INFO L87 Difference]: Start difference. First operand 344 states and 613 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) [2021-08-06 19:53:33,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:53:33,316 INFO L93 Difference]: Finished difference Result 478 states and 821 transitions. [2021-08-06 19:53:33,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 19:53:33,317 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 [2021-08-06 19:53:33,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:53:33,318 INFO L225 Difference]: With dead ends: 478 [2021-08-06 19:53:33,318 INFO L226 Difference]: Without dead ends: 463 [2021-08-06 19:53:33,318 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 351.3ms TimeCoverageRelationStatistics Valid=148, Invalid=554, Unknown=0, NotChecked=0, Total=702 [2021-08-06 19:53:33,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-08-06 19:53:33,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 348. [2021-08-06 19:53:33,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 1.7780979827089338) internal successors, (617), 347 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:53:33,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 617 transitions. [2021-08-06 19:53:33,324 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 617 transitions. Word has length 26 [2021-08-06 19:53:33,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:53:33,324 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 617 transitions. [2021-08-06 19:53:33,324 INFO L471 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) [2021-08-06 19:53:33,324 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 617 transitions. [2021-08-06 19:53:33,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 19:53:33,325 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:53:33,325 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:53:33,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-08-06 19:53:33,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-08-06 19:53:33,541 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:53:33,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:53:33,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1163242348, now seen corresponding path program 38 times [2021-08-06 19:53:33,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:53:33,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035690081] [2021-08-06 19:53:33,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:53:33,541 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:53:33,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:53:33,583 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 34.1 percent of original size [2021-08-06 19:53:33,585 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 34.1 percent of original size [2021-08-06 19:53:33,601 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 28.9 percent of original size [2021-08-06 19:53:33,603 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 28.9 percent of original size [2021-08-06 19:53:33,616 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 44.0 percent of original size [2021-08-06 19:53:33,617 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 44.0 percent of original size [2021-08-06 19:53:33,632 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 23, result has 11.5 percent of original size [2021-08-06 19:53:33,633 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 23, result has 11.5 percent of original size [2021-08-06 19:53:33,640 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:53:33,641 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:53:33,660 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:53:33,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:53:33,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035690081] [2021-08-06 19:53:33,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035690081] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:53:33,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267955232] [2021-08-06 19:53:33,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:53:33,660 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:53:33,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:53:33,661 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:53:33,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-06 19:53:34,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:53:34,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:53:34,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 19:53:34,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:53:35,070 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 19:53:35,074 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 19:53:35,511 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:53:35,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267955232] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:53:35,511 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:53:35,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-06 19:53:35,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178734539] [2021-08-06 19:53:35,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 19:53:35,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:53:35,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 19:53:35,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:53:35,512 INFO L87 Difference]: Start difference. First operand 348 states and 617 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) [2021-08-06 19:53:35,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:53:35,872 INFO L93 Difference]: Finished difference Result 487 states and 829 transitions. [2021-08-06 19:53:35,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:53:35,872 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 [2021-08-06 19:53:35,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:53:35,874 INFO L225 Difference]: With dead ends: 487 [2021-08-06 19:53:35,874 INFO L226 Difference]: Without dead ends: 472 [2021-08-06 19:53:35,874 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 394.8ms TimeCoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2021-08-06 19:53:35,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-08-06 19:53:35,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 365. [2021-08-06 19:53:35,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 1.771978021978022) internal successors, (645), 364 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:53:35,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 645 transitions. [2021-08-06 19:53:35,880 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 645 transitions. Word has length 26 [2021-08-06 19:53:35,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:53:35,880 INFO L470 AbstractCegarLoop]: Abstraction has 365 states and 645 transitions. [2021-08-06 19:53:35,880 INFO L471 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) [2021-08-06 19:53:35,881 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 645 transitions. [2021-08-06 19:53:35,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 19:53:35,881 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:53:35,881 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:53:35,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-08-06 19:53:36,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-08-06 19:53:36,100 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:53:36,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:53:36,100 INFO L82 PathProgramCache]: Analyzing trace with hash -260689652, now seen corresponding path program 39 times [2021-08-06 19:53:36,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:53:36,100 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645552441] [2021-08-06 19:53:36,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:53:36,100 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:53:36,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:53:36,148 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 78.9 percent of original size [2021-08-06 19:53:36,150 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 78.9 percent of original size [2021-08-06 19:53:36,167 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 19:53:36,168 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 19:53:36,178 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 50.0 percent of original size [2021-08-06 19:53:36,179 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 50.0 percent of original size [2021-08-06 19:53:36,190 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 30.0 percent of original size [2021-08-06 19:53:36,191 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 30.0 percent of original size [2021-08-06 19:53:36,198 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:53:36,199 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:53:36,218 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:53:36,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:53:36,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645552441] [2021-08-06 19:53:36,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645552441] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:53:36,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764313153] [2021-08-06 19:53:36,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:53:36,218 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:53:36,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:53:36,219 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:53:36,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-06 19:53:37,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 19:53:37,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:53:37,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 19:53:37,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:53:37,766 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 61.0 percent of original size [2021-08-06 19:53:37,769 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 61.0 percent of original size [2021-08-06 19:53:37,933 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:53:37,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764313153] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:53:37,934 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:53:37,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-06 19:53:37,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443422679] [2021-08-06 19:53:37,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 19:53:37,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:53:37,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 19:53:37,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:53:37,935 INFO L87 Difference]: Start difference. First operand 365 states and 645 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) [2021-08-06 19:53:38,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:53:38,246 INFO L93 Difference]: Finished difference Result 483 states and 829 transitions. [2021-08-06 19:53:38,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:53:38,247 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 [2021-08-06 19:53:38,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:53:38,248 INFO L225 Difference]: With dead ends: 483 [2021-08-06 19:53:38,248 INFO L226 Difference]: Without dead ends: 468 [2021-08-06 19:53:38,248 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 337.5ms TimeCoverageRelationStatistics Valid=196, Invalid=616, Unknown=0, NotChecked=0, Total=812 [2021-08-06 19:53:38,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-08-06 19:53:38,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 371. [2021-08-06 19:53:38,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 1.7621621621621621) internal successors, (652), 370 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:53:38,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 652 transitions. [2021-08-06 19:53:38,254 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 652 transitions. Word has length 26 [2021-08-06 19:53:38,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:53:38,254 INFO L470 AbstractCegarLoop]: Abstraction has 371 states and 652 transitions. [2021-08-06 19:53:38,254 INFO L471 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) [2021-08-06 19:53:38,254 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 652 transitions. [2021-08-06 19:53:38,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 19:53:38,255 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:53:38,255 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:53:38,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-08-06 19:53:38,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:53:38,473 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:53:38,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:53:38,473 INFO L82 PathProgramCache]: Analyzing trace with hash 118798750, now seen corresponding path program 40 times [2021-08-06 19:53:38,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:53:38,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713295490] [2021-08-06 19:53:38,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:53:38,473 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:53:38,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:53:38,517 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 55.6 percent of original size [2021-08-06 19:53:38,519 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 55.6 percent of original size [2021-08-06 19:53:38,535 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 19:53:38,536 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 19:53:38,545 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 20, result has 25.9 percent of original size [2021-08-06 19:53:38,546 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 20, result has 25.9 percent of original size [2021-08-06 19:53:38,556 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 65.2 percent of original size [2021-08-06 19:53:38,557 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 65.2 percent of original size [2021-08-06 19:53:38,571 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 80, result has 12.1 percent of original size [2021-08-06 19:53:38,572 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 80, result has 12.1 percent of original size [2021-08-06 19:53:38,587 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:53:38,587 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:53:38,604 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:53:38,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:53:38,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713295490] [2021-08-06 19:53:38,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713295490] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:53:38,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098352198] [2021-08-06 19:53:38,604 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:53:38,604 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:53:38,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:53:38,605 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:53:38,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-06 19:53:39,850 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:53:39,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:53:39,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:53:39,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:53:40,201 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 61.0 percent of original size [2021-08-06 19:53:40,204 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 61.0 percent of original size [2021-08-06 19:53:40,454 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:53:40,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098352198] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:53:40,454 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:53:40,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 19:53:40,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673859145] [2021-08-06 19:53:40,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 19:53:40,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:53:40,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 19:53:40,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:53:40,455 INFO L87 Difference]: Start difference. First operand 371 states and 652 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-08-06 19:53:40,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:53:40,864 INFO L93 Difference]: Finished difference Result 539 states and 927 transitions. [2021-08-06 19:53:40,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 19:53:40,865 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 [2021-08-06 19:53:40,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:53:40,866 INFO L225 Difference]: With dead ends: 539 [2021-08-06 19:53:40,866 INFO L226 Difference]: Without dead ends: 520 [2021-08-06 19:53:40,866 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 469.5ms TimeCoverageRelationStatistics Valid=265, Invalid=995, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 19:53:40,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-08-06 19:53:40,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 406. [2021-08-06 19:53:40,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 1.7679012345679013) internal successors, (716), 405 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:53:40,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 716 transitions. [2021-08-06 19:53:40,872 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 716 transitions. Word has length 28 [2021-08-06 19:53:40,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:53:40,872 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 716 transitions. [2021-08-06 19:53:40,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-08-06 19:53:40,872 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 716 transitions. [2021-08-06 19:53:40,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 19:53:40,873 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:53:40,873 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:53:40,900 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-08-06 19:53:41,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-06 19:53:41,099 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:53:41,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:53:41,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1030010918, now seen corresponding path program 41 times [2021-08-06 19:53:41,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:53:41,100 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338908525] [2021-08-06 19:53:41,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:53:41,100 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:53:41,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:53:41,143 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 70.4 percent of original size [2021-08-06 19:53:41,146 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 70.4 percent of original size [2021-08-06 19:53:41,193 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 19:53:41,195 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 19:53:41,208 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 30.0 percent of original size [2021-08-06 19:53:41,208 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 30.0 percent of original size [2021-08-06 19:53:41,215 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:53:41,216 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:53:41,234 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:53:41,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:53:41,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338908525] [2021-08-06 19:53:41,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338908525] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:53:41,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362435785] [2021-08-06 19:53:41,234 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:53:41,235 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:53:41,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:53:41,235 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:53:41,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-06 19:53:42,524 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 19:53:42,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:53:42,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:53:42,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:53:42,829 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 19:53:42,832 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 19:53:43,188 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:53:43,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362435785] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:53:43,189 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:53:43,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 19:53:43,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75466471] [2021-08-06 19:53:43,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 19:53:43,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:53:43,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 19:53:43,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:53:43,190 INFO L87 Difference]: Start difference. First operand 406 states and 716 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-08-06 19:53:43,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:53:43,479 INFO L93 Difference]: Finished difference Result 508 states and 868 transitions. [2021-08-06 19:53:43,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 19:53:43,479 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 [2021-08-06 19:53:43,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:53:43,481 INFO L225 Difference]: With dead ends: 508 [2021-08-06 19:53:43,481 INFO L226 Difference]: Without dead ends: 497 [2021-08-06 19:53:43,481 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 382.3ms TimeCoverageRelationStatistics Valid=151, Invalid=719, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:53:43,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-08-06 19:53:43,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 410. [2021-08-06 19:53:43,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 1.7726161369193154) internal successors, (725), 409 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:53:43,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 725 transitions. [2021-08-06 19:53:43,486 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 725 transitions. Word has length 28 [2021-08-06 19:53:43,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:53:43,487 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 725 transitions. [2021-08-06 19:53:43,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-08-06 19:53:43,487 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 725 transitions. [2021-08-06 19:53:43,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 19:53:43,488 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:53:43,488 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:53:43,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-08-06 19:53:43,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:53:43,697 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:53:43,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:53:43,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1515938514, now seen corresponding path program 42 times [2021-08-06 19:53:43,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:53:43,698 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345991246] [2021-08-06 19:53:43,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:53:43,698 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:53:43,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:53:43,743 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 55.6 percent of original size [2021-08-06 19:53:43,745 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 55.6 percent of original size [2021-08-06 19:53:43,761 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 19:53:43,762 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 19:53:43,784 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 25, result has 30.6 percent of original size [2021-08-06 19:53:43,785 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 25, result has 30.6 percent of original size [2021-08-06 19:53:43,799 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 30.0 percent of original size [2021-08-06 19:53:43,799 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 30.0 percent of original size [2021-08-06 19:53:43,806 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:53:43,806 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:53:43,824 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:53:43,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:53:43,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345991246] [2021-08-06 19:53:43,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345991246] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:53:43,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941381324] [2021-08-06 19:53:43,824 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:53:43,825 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:53:43,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:53:43,826 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:53:43,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-08-06 19:53:45,155 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 19:53:45,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:53:45,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:53:45,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:53:45,425 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 19:53:45,428 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 19:53:45,880 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:53:45,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941381324] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:53:45,881 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:53:45,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 19:53:45,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228038353] [2021-08-06 19:53:45,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 19:53:45,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:53:45,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 19:53:45,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:53:45,882 INFO L87 Difference]: Start difference. First operand 410 states and 725 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:53:46,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:53:46,200 INFO L93 Difference]: Finished difference Result 496 states and 857 transitions. [2021-08-06 19:53:46,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 19:53:46,200 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have 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 [2021-08-06 19:53:46,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:53:46,201 INFO L225 Difference]: With dead ends: 496 [2021-08-06 19:53:46,201 INFO L226 Difference]: Without dead ends: 485 [2021-08-06 19:53:46,201 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 418.3ms TimeCoverageRelationStatistics Valid=183, Invalid=873, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 19:53:46,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-08-06 19:53:46,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 409. [2021-08-06 19:53:46,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 1.7720588235294117) internal successors, (723), 408 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:53:46,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 723 transitions. [2021-08-06 19:53:46,207 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 723 transitions. Word has length 28 [2021-08-06 19:53:46,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:53:46,208 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 723 transitions. [2021-08-06 19:53:46,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:53:46,208 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 723 transitions. [2021-08-06 19:53:46,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 19:53:46,209 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:53:46,209 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:53:46,230 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2021-08-06 19:53:46,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-08-06 19:53:46,417 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:53:46,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:53:46,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1344252250, now seen corresponding path program 43 times [2021-08-06 19:53:46,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:53:46,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829996566] [2021-08-06 19:53:46,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:53:46,417 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:53:46,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:53:46,458 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 46.7 percent of original size [2021-08-06 19:53:46,460 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 46.7 percent of original size [2021-08-06 19:53:46,513 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 65.2 percent of original size [2021-08-06 19:53:46,515 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 65.2 percent of original size [2021-08-06 19:53:46,530 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 44, result has 20.0 percent of original size [2021-08-06 19:53:46,531 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 44, result has 20.0 percent of original size [2021-08-06 19:53:46,547 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:53:46,547 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:53:46,567 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:53:46,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:53:46,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829996566] [2021-08-06 19:53:46,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829996566] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:53:46,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437938301] [2021-08-06 19:53:46,568 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:53:46,568 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:53:46,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:53:46,569 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:53:46,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-08-06 19:53:47,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:53:47,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:53:47,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:53:48,165 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 19:53:48,167 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 19:53:48,615 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:53:48,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437938301] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:53:48,615 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:53:48,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 19:53:48,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124160792] [2021-08-06 19:53:48,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 19:53:48,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:53:48,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 19:53:48,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:53:48,616 INFO L87 Difference]: Start difference. First operand 409 states and 723 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-08-06 19:53:49,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:53:49,031 INFO L93 Difference]: Finished difference Result 587 states and 1010 transitions. [2021-08-06 19:53:49,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 19:53:49,031 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 [2021-08-06 19:53:49,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:53:49,033 INFO L225 Difference]: With dead ends: 587 [2021-08-06 19:53:49,033 INFO L226 Difference]: Without dead ends: 568 [2021-08-06 19:53:49,033 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 480.7ms TimeCoverageRelationStatistics Valid=232, Invalid=958, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 19:53:49,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-08-06 19:53:49,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 430. [2021-08-06 19:53:49,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 429 states have (on average 1.7715617715617715) internal successors, (760), 429 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:53:49,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 760 transitions. [2021-08-06 19:53:49,041 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 760 transitions. Word has length 28 [2021-08-06 19:53:49,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:53:49,041 INFO L470 AbstractCegarLoop]: Abstraction has 430 states and 760 transitions. [2021-08-06 19:53:49,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-08-06 19:53:49,041 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 760 transitions. [2021-08-06 19:53:49,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 19:53:49,042 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:53:49,042 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:53:49,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-08-06 19:53:49,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-08-06 19:53:49,261 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:53:49,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:53:49,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1503886382, now seen corresponding path program 44 times [2021-08-06 19:53:49,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:53:49,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030729103] [2021-08-06 19:53:49,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:53:49,261 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:53:49,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:53:49,302 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 46.7 percent of original size [2021-08-06 19:53:49,304 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 46.7 percent of original size [2021-08-06 19:53:49,358 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 59.0 percent of original size [2021-08-06 19:53:49,361 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 59.0 percent of original size [2021-08-06 19:53:49,379 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 12.5 percent of original size [2021-08-06 19:53:49,380 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 12.5 percent of original size [2021-08-06 19:53:49,388 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:53:49,389 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:53:49,412 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:53:49,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:53:49,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030729103] [2021-08-06 19:53:49,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030729103] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:53:49,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498605564] [2021-08-06 19:53:49,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:53:49,413 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:53:49,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:53:49,414 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:53:49,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-08-06 19:53:50,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:53:50,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:53:50,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:53:50,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:53:51,070 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 19:53:51,073 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 19:53:51,619 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:53:51,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498605564] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:53:51,619 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:53:51,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 19:53:51,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410791223] [2021-08-06 19:53:51,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 19:53:51,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:53:51,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 19:53:51,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:53:51,620 INFO L87 Difference]: Start difference. First operand 430 states and 760 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:53:52,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:53:52,083 INFO L93 Difference]: Finished difference Result 545 states and 937 transitions. [2021-08-06 19:53:52,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 19:53:52,084 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have 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 [2021-08-06 19:53:52,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:53:52,086 INFO L225 Difference]: With dead ends: 545 [2021-08-06 19:53:52,086 INFO L226 Difference]: Without dead ends: 534 [2021-08-06 19:53:52,086 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 514.1ms TimeCoverageRelationStatistics Valid=179, Invalid=877, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 19:53:52,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-08-06 19:53:52,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 414. [2021-08-06 19:53:52,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 1.7772397094430992) internal successors, (734), 413 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:53:52,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 734 transitions. [2021-08-06 19:53:52,092 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 734 transitions. Word has length 28 [2021-08-06 19:53:52,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:53:52,093 INFO L470 AbstractCegarLoop]: Abstraction has 414 states and 734 transitions. [2021-08-06 19:53:52,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:53:52,093 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 734 transitions. [2021-08-06 19:53:52,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 19:53:52,094 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:53:52,094 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:53:52,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-08-06 19:53:52,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:53:52,321 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:53:52,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:53:52,321 INFO L82 PathProgramCache]: Analyzing trace with hash -111454186, now seen corresponding path program 45 times [2021-08-06 19:53:52,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:53:52,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225820910] [2021-08-06 19:53:52,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:53:52,321 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:53:52,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:53:52,367 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 42, result has 25.0 percent of original size [2021-08-06 19:53:52,369 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 42, result has 25.0 percent of original size [2021-08-06 19:53:52,386 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 42, result has 25.0 percent of original size [2021-08-06 19:53:52,388 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 42, result has 25.0 percent of original size [2021-08-06 19:53:52,406 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 31, result has 46.6 percent of original size [2021-08-06 19:53:52,409 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 31, result has 46.6 percent of original size [2021-08-06 19:53:52,442 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 61.1 percent of original size [2021-08-06 19:53:52,443 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 61.1 percent of original size [2021-08-06 19:53:52,458 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 45.8 percent of original size [2021-08-06 19:53:52,460 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 45.8 percent of original size [2021-08-06 19:53:52,477 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:53:52,477 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:53:52,497 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:53:52,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:53:52,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225820910] [2021-08-06 19:53:52,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225820910] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:53:52,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959535019] [2021-08-06 19:53:52,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:53:52,497 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:53:52,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:53:52,498 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:53:52,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-08-06 19:53:53,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 19:53:53,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:53:53,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:53:53,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:53:54,167 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 19:53:54,170 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 19:53:54,890 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:53:54,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959535019] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:53:54,890 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:53:54,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 19:53:54,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504452971] [2021-08-06 19:53:54,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 19:53:54,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:53:54,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 19:53:54,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:53:54,891 INFO L87 Difference]: Start difference. First operand 414 states and 734 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:53:55,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:53:55,384 INFO L93 Difference]: Finished difference Result 556 states and 952 transitions. [2021-08-06 19:53:55,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 19:53:55,384 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have 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 [2021-08-06 19:53:55,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:53:55,386 INFO L225 Difference]: With dead ends: 556 [2021-08-06 19:53:55,386 INFO L226 Difference]: Without dead ends: 541 [2021-08-06 19:53:55,386 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 638.5ms TimeCoverageRelationStatistics Valid=196, Invalid=796, Unknown=0, NotChecked=0, Total=992 [2021-08-06 19:53:55,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2021-08-06 19:53:55,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 427. [2021-08-06 19:53:55,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 1.7910798122065728) internal successors, (763), 426 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:53:55,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 763 transitions. [2021-08-06 19:53:55,392 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 763 transitions. Word has length 28 [2021-08-06 19:53:55,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:53:55,392 INFO L470 AbstractCegarLoop]: Abstraction has 427 states and 763 transitions. [2021-08-06 19:53:55,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:53:55,392 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 763 transitions. [2021-08-06 19:53:55,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 19:53:55,393 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:53:55,393 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:53:55,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-08-06 19:53:55,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-08-06 19:53:55,609 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:53:55,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:53:55,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1842223918, now seen corresponding path program 46 times [2021-08-06 19:53:55,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:53:55,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957190159] [2021-08-06 19:53:55,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:53:55,609 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:53:55,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:53:55,652 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 50, result has 21.9 percent of original size [2021-08-06 19:53:55,654 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 50, result has 21.9 percent of original size [2021-08-06 19:53:55,668 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 50, result has 21.9 percent of original size [2021-08-06 19:53:55,670 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 50, result has 21.9 percent of original size [2021-08-06 19:53:55,685 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 50, result has 35.1 percent of original size [2021-08-06 19:53:55,688 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 50, result has 35.1 percent of original size [2021-08-06 19:53:55,716 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 41, result has 21.2 percent of original size [2021-08-06 19:53:55,717 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 41, result has 21.2 percent of original size [2021-08-06 19:53:55,731 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 55, result has 5.2 percent of original size [2021-08-06 19:53:55,732 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 55, result has 5.2 percent of original size [2021-08-06 19:53:55,739 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:53:55,739 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:53:55,757 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:53:55,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:53:55,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957190159] [2021-08-06 19:53:55,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957190159] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:53:55,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666629994] [2021-08-06 19:53:55,757 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:53:55,758 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:53:55,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:53:55,764 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:53:55,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-08-06 19:53:57,311 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:53:57,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:53:57,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:53:57,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:53:57,503 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 19:53:57,506 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 19:53:58,202 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:53:58,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666629994] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:53:58,202 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:53:58,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 19:53:58,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076029478] [2021-08-06 19:53:58,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 19:53:58,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:53:58,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 19:53:58,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:53:58,203 INFO L87 Difference]: Start difference. First operand 427 states and 763 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-08-06 19:53:58,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:53:58,609 INFO L93 Difference]: Finished difference Result 542 states and 934 transitions. [2021-08-06 19:53:58,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:53:58,610 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 [2021-08-06 19:53:58,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:53:58,611 INFO L225 Difference]: With dead ends: 542 [2021-08-06 19:53:58,611 INFO L226 Difference]: Without dead ends: 531 [2021-08-06 19:53:58,611 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 536.4ms TimeCoverageRelationStatistics Valid=157, Invalid=773, Unknown=0, NotChecked=0, Total=930 [2021-08-06 19:53:58,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-08-06 19:53:58,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 423. [2021-08-06 19:53:58,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 1.7867298578199051) internal successors, (754), 422 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:53:58,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 754 transitions. [2021-08-06 19:53:58,616 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 754 transitions. Word has length 28 [2021-08-06 19:53:58,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:53:58,617 INFO L470 AbstractCegarLoop]: Abstraction has 423 states and 754 transitions. [2021-08-06 19:53:58,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-08-06 19:53:58,617 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 754 transitions. [2021-08-06 19:53:58,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 19:53:58,618 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:53:58,618 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:53:58,639 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-08-06 19:53:58,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-08-06 19:53:58,823 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:53:58,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:53:58,823 INFO L82 PathProgramCache]: Analyzing trace with hash -2048162350, now seen corresponding path program 47 times [2021-08-06 19:53:58,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:53:58,823 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499612989] [2021-08-06 19:53:58,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:53:58,823 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:53:58,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:53:58,880 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 23, result has 39.5 percent of original size [2021-08-06 19:53:58,882 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 23, result has 39.5 percent of original size [2021-08-06 19:53:58,903 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 23, result has 39.5 percent of original size [2021-08-06 19:53:58,905 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 23, result has 39.5 percent of original size [2021-08-06 19:53:58,925 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 25, result has 51.0 percent of original size [2021-08-06 19:53:58,929 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 25, result has 51.0 percent of original size [2021-08-06 19:53:58,962 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 33.3 percent of original size [2021-08-06 19:53:58,964 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 33.3 percent of original size [2021-08-06 19:53:58,979 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 30.0 percent of original size [2021-08-06 19:53:58,980 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 30.0 percent of original size [2021-08-06 19:53:58,988 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:53:58,989 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:53:59,011 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:53:59,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:53:59,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499612989] [2021-08-06 19:53:59,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499612989] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:53:59,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311045479] [2021-08-06 19:53:59,012 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:53:59,012 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:53:59,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:53:59,013 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:53:59,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-08-06 19:54:00,642 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-06 19:54:00,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:54:00,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:54:00,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:54:00,861 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 19:54:00,864 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 19:54:01,426 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:54:01,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311045479] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:54:01,426 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:54:01,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 19:54:01,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039716295] [2021-08-06 19:54:01,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 19:54:01,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:54:01,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 19:54:01,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:54:01,427 INFO L87 Difference]: Start difference. First operand 423 states and 754 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-08-06 19:54:01,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:54:01,737 INFO L93 Difference]: Finished difference Result 551 states and 952 transitions. [2021-08-06 19:54:01,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 19:54:01,737 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 [2021-08-06 19:54:01,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:54:01,739 INFO L225 Difference]: With dead ends: 551 [2021-08-06 19:54:01,739 INFO L226 Difference]: Without dead ends: 532 [2021-08-06 19:54:01,739 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 413.7ms TimeCoverageRelationStatistics Valid=151, Invalid=719, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:54:01,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-08-06 19:54:01,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 432. [2021-08-06 19:54:01,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 1.7935034802784222) internal successors, (773), 431 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:54:01,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 773 transitions. [2021-08-06 19:54:01,744 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 773 transitions. Word has length 28 [2021-08-06 19:54:01,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:54:01,744 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 773 transitions. [2021-08-06 19:54:01,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-08-06 19:54:01,744 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 773 transitions. [2021-08-06 19:54:01,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 19:54:01,745 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:54:01,745 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:54:01,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-08-06 19:54:01,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:54:01,945 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:54:01,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:54:01,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1860472050, now seen corresponding path program 48 times [2021-08-06 19:54:01,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:54:01,946 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331180742] [2021-08-06 19:54:01,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:54:01,946 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:54:01,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:54:01,987 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 23, result has 39.5 percent of original size [2021-08-06 19:54:01,989 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 23, result has 39.5 percent of original size [2021-08-06 19:54:02,006 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 23, result has 39.5 percent of original size [2021-08-06 19:54:02,008 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 23, result has 39.5 percent of original size [2021-08-06 19:54:02,025 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 25, result has 51.0 percent of original size [2021-08-06 19:54:02,028 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 25, result has 51.0 percent of original size [2021-08-06 19:54:02,058 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 33.3 percent of original size [2021-08-06 19:54:02,060 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 33.3 percent of original size [2021-08-06 19:54:02,075 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 44, result has 20.0 percent of original size [2021-08-06 19:54:02,076 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 44, result has 20.0 percent of original size [2021-08-06 19:54:02,092 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:54:02,093 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:54:02,111 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:54:02,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:54:02,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331180742] [2021-08-06 19:54:02,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331180742] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:54:02,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692792082] [2021-08-06 19:54:02,112 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:54:02,112 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:54:02,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:54:02,117 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:54:02,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-08-06 19:54:03,827 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 19:54:03,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:54:03,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:54:03,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:54:04,019 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 19:54:04,022 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 19:54:04,702 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:54:04,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692792082] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:54:04,702 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:54:04,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 19:54:04,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528944814] [2021-08-06 19:54:04,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 19:54:04,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:54:04,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 19:54:04,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:54:04,703 INFO L87 Difference]: Start difference. First operand 432 states and 773 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:54:05,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:54:05,167 INFO L93 Difference]: Finished difference Result 551 states and 959 transitions. [2021-08-06 19:54:05,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 19:54:05,167 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have 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 [2021-08-06 19:54:05,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:54:05,169 INFO L225 Difference]: With dead ends: 551 [2021-08-06 19:54:05,169 INFO L226 Difference]: Without dead ends: 536 [2021-08-06 19:54:05,169 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 611.6ms TimeCoverageRelationStatistics Valid=210, Invalid=846, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 19:54:05,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-08-06 19:54:05,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 437. [2021-08-06 19:54:05,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 436 states have (on average 1.7958715596330275) internal successors, (783), 436 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:54:05,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 783 transitions. [2021-08-06 19:54:05,176 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 783 transitions. Word has length 28 [2021-08-06 19:54:05,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:54:05,176 INFO L470 AbstractCegarLoop]: Abstraction has 437 states and 783 transitions. [2021-08-06 19:54:05,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:54:05,176 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 783 transitions. [2021-08-06 19:54:05,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 19:54:05,177 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:54:05,177 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:54:05,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-08-06 19:54:05,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:54:05,393 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:54:05,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:54:05,393 INFO L82 PathProgramCache]: Analyzing trace with hash -345409642, now seen corresponding path program 49 times [2021-08-06 19:54:05,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:54:05,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507474484] [2021-08-06 19:54:05,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:54:05,393 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:54:05,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:54:05,449 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 71, result has 23.7 percent of original size [2021-08-06 19:54:05,453 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 71, result has 23.7 percent of original size [2021-08-06 19:54:05,475 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 132, result has 30.2 percent of original size [2021-08-06 19:54:05,483 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 132, result has 30.2 percent of original size [2021-08-06 19:54:05,511 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 138, result has 29.9 percent of original size [2021-08-06 19:54:05,525 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 138, result has 29.9 percent of original size [2021-08-06 19:54:05,562 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 31, result has 26.2 percent of original size [2021-08-06 19:54:05,564 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 31, result has 26.2 percent of original size [2021-08-06 19:54:05,580 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:54:05,581 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:54:05,601 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:54:05,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:54:05,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507474484] [2021-08-06 19:54:05,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507474484] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:54:05,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518538589] [2021-08-06 19:54:05,601 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:54:05,601 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:54:05,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:54:05,602 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:54:05,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-08-06 19:54:07,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:54:07,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:54:07,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:54:07,493 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:54:07,495 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:54:08,084 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:54:08,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518538589] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:54:08,084 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:54:08,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 19:54:08,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525366046] [2021-08-06 19:54:08,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 19:54:08,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:54:08,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 19:54:08,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:54:08,085 INFO L87 Difference]: Start difference. First operand 437 states and 783 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-08-06 19:54:08,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:54:08,418 INFO L93 Difference]: Finished difference Result 581 states and 1007 transitions. [2021-08-06 19:54:08,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:54:08,419 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 [2021-08-06 19:54:08,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:54:08,420 INFO L225 Difference]: With dead ends: 581 [2021-08-06 19:54:08,420 INFO L226 Difference]: Without dead ends: 566 [2021-08-06 19:54:08,420 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 446.7ms TimeCoverageRelationStatistics Valid=190, Invalid=740, Unknown=0, NotChecked=0, Total=930 [2021-08-06 19:54:08,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-08-06 19:54:08,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 453. [2021-08-06 19:54:08,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 452 states have (on average 1.8008849557522124) internal successors, (814), 452 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:54:08,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 814 transitions. [2021-08-06 19:54:08,425 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 814 transitions. Word has length 28 [2021-08-06 19:54:08,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:54:08,426 INFO L470 AbstractCegarLoop]: Abstraction has 453 states and 814 transitions. [2021-08-06 19:54:08,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-08-06 19:54:08,426 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 814 transitions. [2021-08-06 19:54:08,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 19:54:08,427 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:54:08,427 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:54:08,450 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2021-08-06 19:54:08,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:54:08,636 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:54:08,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:54:08,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1573050390, now seen corresponding path program 50 times [2021-08-06 19:54:08,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:54:08,636 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927147428] [2021-08-06 19:54:08,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:54:08,637 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:54:08,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:54:08,694 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 77.8 percent of original size [2021-08-06 19:54:08,696 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 77.8 percent of original size [2021-08-06 19:54:08,712 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 88, result has 16.2 percent of original size [2021-08-06 19:54:08,714 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 88, result has 16.2 percent of original size [2021-08-06 19:54:08,732 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 77, result has 29.4 percent of original size [2021-08-06 19:54:08,736 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 77, result has 29.4 percent of original size [2021-08-06 19:54:08,764 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 45.8 percent of original size [2021-08-06 19:54:08,765 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 45.8 percent of original size [2021-08-06 19:54:08,783 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:54:08,784 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:54:08,802 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:54:08,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:54:08,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927147428] [2021-08-06 19:54:08,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927147428] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:54:08,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426936184] [2021-08-06 19:54:08,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:54:08,803 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:54:08,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:54:08,810 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:54:08,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-08-06 19:54:10,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:54:10,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:54:10,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:54:10,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:54:10,681 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:54:10,682 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:54:11,347 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:54:11,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426936184] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:54:11,347 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:54:11,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 19:54:11,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458829913] [2021-08-06 19:54:11,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 19:54:11,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:54:11,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 19:54:11,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:54:11,348 INFO L87 Difference]: Start difference. First operand 453 states and 814 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:54:11,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:54:11,757 INFO L93 Difference]: Finished difference Result 594 states and 1031 transitions. [2021-08-06 19:54:11,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 19:54:11,758 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have 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 [2021-08-06 19:54:11,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:54:11,759 INFO L225 Difference]: With dead ends: 594 [2021-08-06 19:54:11,759 INFO L226 Difference]: Without dead ends: 583 [2021-08-06 19:54:11,759 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 527.3ms TimeCoverageRelationStatistics Valid=199, Invalid=857, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 19:54:11,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-08-06 19:54:11,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 465. [2021-08-06 19:54:11,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 1.8017241379310345) internal successors, (836), 464 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:54:11,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 836 transitions. [2021-08-06 19:54:11,764 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 836 transitions. Word has length 28 [2021-08-06 19:54:11,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:54:11,765 INFO L470 AbstractCegarLoop]: Abstraction has 465 states and 836 transitions. [2021-08-06 19:54:11,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:54:11,765 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 836 transitions. [2021-08-06 19:54:11,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 19:54:11,765 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:54:11,765 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:54:11,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-08-06 19:54:11,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-08-06 19:54:11,967 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:54:11,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:54:11,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1234712854, now seen corresponding path program 51 times [2021-08-06 19:54:11,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:54:11,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102424906] [2021-08-06 19:54:11,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:54:11,967 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:54:11,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:54:12,022 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 54, result has 20.6 percent of original size [2021-08-06 19:54:12,024 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 54, result has 20.6 percent of original size [2021-08-06 19:54:12,042 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 63, result has 29.2 percent of original size [2021-08-06 19:54:12,046 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 63, result has 29.2 percent of original size [2021-08-06 19:54:12,078 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 26, result has 29.7 percent of original size [2021-08-06 19:54:12,080 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 26, result has 29.7 percent of original size [2021-08-06 19:54:12,096 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 50, result has 31.5 percent of original size [2021-08-06 19:54:12,099 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 50, result has 31.5 percent of original size [2021-08-06 19:54:12,121 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:54:12,122 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:54:12,145 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:54:12,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:54:12,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102424906] [2021-08-06 19:54:12,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102424906] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:54:12,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113029537] [2021-08-06 19:54:12,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:54:12,146 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:54:12,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:54:12,147 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:54:12,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-08-06 19:54:13,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 19:54:13,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:54:13,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:54:13,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:54:14,054 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:54:14,056 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:54:14,776 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:54:14,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113029537] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:54:14,776 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:54:14,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 19:54:14,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427270613] [2021-08-06 19:54:14,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 19:54:14,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:54:14,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 19:54:14,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:54:14,777 INFO L87 Difference]: Start difference. First operand 465 states and 836 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:54:15,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:54:15,180 INFO L93 Difference]: Finished difference Result 627 states and 1081 transitions. [2021-08-06 19:54:15,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 19:54:15,180 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have 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 [2021-08-06 19:54:15,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:54:15,182 INFO L225 Difference]: With dead ends: 627 [2021-08-06 19:54:15,182 INFO L226 Difference]: Without dead ends: 616 [2021-08-06 19:54:15,182 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 557.8ms TimeCoverageRelationStatistics Valid=191, Invalid=801, Unknown=0, NotChecked=0, Total=992 [2021-08-06 19:54:15,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2021-08-06 19:54:15,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 473. [2021-08-06 19:54:15,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 1.8093220338983051) internal successors, (854), 472 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:54:15,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 854 transitions. [2021-08-06 19:54:15,187 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 854 transitions. Word has length 28 [2021-08-06 19:54:15,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:54:15,187 INFO L470 AbstractCegarLoop]: Abstraction has 473 states and 854 transitions. [2021-08-06 19:54:15,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:54:15,187 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 854 transitions. [2021-08-06 19:54:15,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 19:54:15,188 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:54:15,188 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:54:15,213 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2021-08-06 19:54:15,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-08-06 19:54:15,400 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:54:15,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:54:15,401 INFO L82 PathProgramCache]: Analyzing trace with hash -514305010, now seen corresponding path program 52 times [2021-08-06 19:54:15,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:54:15,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109423596] [2021-08-06 19:54:15,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:54:15,401 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:54:15,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:54:15,462 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 41, result has 26.8 percent of original size [2021-08-06 19:54:15,465 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 41, result has 26.8 percent of original size [2021-08-06 19:54:15,484 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 55, result has 32.1 percent of original size [2021-08-06 19:54:15,487 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 55, result has 32.1 percent of original size [2021-08-06 19:54:15,541 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 65, result has 14.5 percent of original size [2021-08-06 19:54:15,544 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 65, result has 14.5 percent of original size [2021-08-06 19:54:15,559 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 31.4 percent of original size [2021-08-06 19:54:15,561 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 31.4 percent of original size [2021-08-06 19:54:15,577 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:54:15,578 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:54:15,598 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:54:15,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:54:15,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109423596] [2021-08-06 19:54:15,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109423596] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:54:15,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182233690] [2021-08-06 19:54:15,598 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:54:15,598 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:54:15,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:54:15,599 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:54:15,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-08-06 19:54:17,448 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:54:17,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:54:17,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:54:17,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:54:17,561 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:54:17,562 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:54:18,289 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:54:18,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182233690] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:54:18,289 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:54:18,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 19:54:18,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314215094] [2021-08-06 19:54:18,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 19:54:18,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:54:18,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 19:54:18,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:54:18,290 INFO L87 Difference]: Start difference. First operand 473 states and 854 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-08-06 19:54:18,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:54:18,722 INFO L93 Difference]: Finished difference Result 597 states and 1047 transitions. [2021-08-06 19:54:18,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 19:54:18,722 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 [2021-08-06 19:54:18,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:54:18,724 INFO L225 Difference]: With dead ends: 597 [2021-08-06 19:54:18,724 INFO L226 Difference]: Without dead ends: 574 [2021-08-06 19:54:18,724 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 556.8ms TimeCoverageRelationStatistics Valid=196, Invalid=796, Unknown=0, NotChecked=0, Total=992 [2021-08-06 19:54:18,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-08-06 19:54:18,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 477. [2021-08-06 19:54:18,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 1.8130252100840336) internal successors, (863), 476 states have internal predecessors, (863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:54:18,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 863 transitions. [2021-08-06 19:54:18,731 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 863 transitions. Word has length 28 [2021-08-06 19:54:18,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:54:18,731 INFO L470 AbstractCegarLoop]: Abstraction has 477 states and 863 transitions. [2021-08-06 19:54:18,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-08-06 19:54:18,731 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 863 transitions. [2021-08-06 19:54:18,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 19:54:18,732 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:54:18,732 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:54:18,756 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2021-08-06 19:54:18,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-08-06 19:54:18,941 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:54:18,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:54:18,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1785112042, now seen corresponding path program 53 times [2021-08-06 19:54:18,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:54:18,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763646157] [2021-08-06 19:54:18,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:54:18,941 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:54:18,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:54:18,998 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 77.8 percent of original size [2021-08-06 19:54:19,000 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 77.8 percent of original size [2021-08-06 19:54:19,017 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 63, result has 29.2 percent of original size [2021-08-06 19:54:19,021 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 63, result has 29.2 percent of original size [2021-08-06 19:54:19,051 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 26, result has 29.7 percent of original size [2021-08-06 19:54:19,052 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 26, result has 29.7 percent of original size [2021-08-06 19:54:19,068 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 50, result has 31.5 percent of original size [2021-08-06 19:54:19,071 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 50, result has 31.5 percent of original size [2021-08-06 19:54:19,092 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:54:19,092 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:54:19,111 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:54:19,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:54:19,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763646157] [2021-08-06 19:54:19,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763646157] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:54:19,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561477544] [2021-08-06 19:54:19,111 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:54:19,111 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:54:19,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:54:19,113 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:54:19,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-08-06 19:54:21,033 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 19:54:21,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:54:21,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:54:21,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:54:21,144 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:54:21,146 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:54:21,927 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:54:21,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561477544] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:54:21,928 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:54:21,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 19:54:21,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935190377] [2021-08-06 19:54:21,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 19:54:21,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:54:21,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 19:54:21,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:54:21,928 INFO L87 Difference]: Start difference. First operand 477 states and 863 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-08-06 19:54:22,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:54:22,316 INFO L93 Difference]: Finished difference Result 609 states and 1065 transitions. [2021-08-06 19:54:22,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:54:22,316 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 [2021-08-06 19:54:22,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:54:22,317 INFO L225 Difference]: With dead ends: 609 [2021-08-06 19:54:22,317 INFO L226 Difference]: Without dead ends: 594 [2021-08-06 19:54:22,317 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 543.8ms TimeCoverageRelationStatistics Valid=195, Invalid=735, Unknown=0, NotChecked=0, Total=930 [2021-08-06 19:54:22,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-08-06 19:54:22,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 485. [2021-08-06 19:54:22,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 1.8202479338842976) internal successors, (881), 484 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:54:22,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 881 transitions. [2021-08-06 19:54:22,322 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 881 transitions. Word has length 28 [2021-08-06 19:54:22,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:54:22,323 INFO L470 AbstractCegarLoop]: Abstraction has 485 states and 881 transitions. [2021-08-06 19:54:22,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-08-06 19:54:22,323 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 881 transitions. [2021-08-06 19:54:22,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 19:54:22,323 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:54:22,323 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:54:22,345 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2021-08-06 19:54:22,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:54:22,524 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:54:22,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:54:22,529 INFO L82 PathProgramCache]: Analyzing trace with hash 779085522, now seen corresponding path program 54 times [2021-08-06 19:54:22,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:54:22,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148541471] [2021-08-06 19:54:22,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:54:22,529 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:54:22,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:54:22,587 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 42.4 percent of original size [2021-08-06 19:54:22,589 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 42.4 percent of original size [2021-08-06 19:54:22,606 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 35, result has 52.7 percent of original size [2021-08-06 19:54:22,611 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 35, result has 52.7 percent of original size [2021-08-06 19:54:22,646 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 59.0 percent of original size [2021-08-06 19:54:22,648 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 59.0 percent of original size [2021-08-06 19:54:22,665 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 30.0 percent of original size [2021-08-06 19:54:22,665 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 30.0 percent of original size [2021-08-06 19:54:22,672 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:54:22,673 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:54:22,690 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:54:22,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:54:22,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148541471] [2021-08-06 19:54:22,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148541471] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:54:22,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229115940] [2021-08-06 19:54:22,691 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:54:22,691 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:54:22,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:54:22,692 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:54:22,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-08-06 19:54:24,684 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 19:54:24,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:54:24,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:54:24,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:54:24,795 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:54:24,797 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:54:25,476 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:54:25,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229115940] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:54:25,477 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:54:25,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 19:54:25,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664534982] [2021-08-06 19:54:25,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 19:54:25,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:54:25,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 19:54:25,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:54:25,478 INFO L87 Difference]: Start difference. First operand 485 states and 881 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:54:25,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:54:25,858 INFO L93 Difference]: Finished difference Result 604 states and 1057 transitions. [2021-08-06 19:54:25,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:54:25,858 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have 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 [2021-08-06 19:54:25,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:54:25,860 INFO L225 Difference]: With dead ends: 604 [2021-08-06 19:54:25,860 INFO L226 Difference]: Without dead ends: 593 [2021-08-06 19:54:25,860 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 482.4ms TimeCoverageRelationStatistics Valid=166, Invalid=764, Unknown=0, NotChecked=0, Total=930 [2021-08-06 19:54:25,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2021-08-06 19:54:25,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 477. [2021-08-06 19:54:25,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 1.8130252100840336) internal successors, (863), 476 states have internal predecessors, (863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:54:25,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 863 transitions. [2021-08-06 19:54:25,866 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 863 transitions. Word has length 28 [2021-08-06 19:54:25,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:54:25,866 INFO L470 AbstractCegarLoop]: Abstraction has 477 states and 863 transitions. [2021-08-06 19:54:25,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:54:25,866 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 863 transitions. [2021-08-06 19:54:25,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 19:54:25,867 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:54:25,867 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:54:25,888 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2021-08-06 19:54:26,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:54:26,067 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:54:26,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:54:26,068 INFO L82 PathProgramCache]: Analyzing trace with hash 573147090, now seen corresponding path program 55 times [2021-08-06 19:54:26,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:54:26,068 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644954889] [2021-08-06 19:54:26,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:54:26,068 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:54:26,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:54:26,144 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 50.0 percent of original size [2021-08-06 19:54:26,147 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 50.0 percent of original size [2021-08-06 19:54:26,178 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 38, result has 22.4 percent of original size [2021-08-06 19:54:26,180 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 38, result has 22.4 percent of original size [2021-08-06 19:54:26,194 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 30.0 percent of original size [2021-08-06 19:54:26,195 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 30.0 percent of original size [2021-08-06 19:54:26,203 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:54:26,203 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:54:26,222 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:54:26,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:54:26,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644954889] [2021-08-06 19:54:26,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644954889] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:54:26,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603136565] [2021-08-06 19:54:26,222 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:54:26,222 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:54:26,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:54:26,223 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:54:26,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-08-06 19:54:28,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:54:28,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:54:28,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:54:28,355 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:54:28,357 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:54:28,984 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:54:28,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603136565] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:54:28,984 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:54:28,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 19:54:28,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603275731] [2021-08-06 19:54:28,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 19:54:28,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:54:28,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 19:54:28,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:54:28,985 INFO L87 Difference]: Start difference. First operand 477 states and 863 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-08-06 19:54:29,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:54:29,311 INFO L93 Difference]: Finished difference Result 602 states and 1053 transitions. [2021-08-06 19:54:29,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 19:54:29,311 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 [2021-08-06 19:54:29,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:54:29,313 INFO L225 Difference]: With dead ends: 602 [2021-08-06 19:54:29,313 INFO L226 Difference]: Without dead ends: 583 [2021-08-06 19:54:29,313 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 403.0ms TimeCoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:54:29,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-08-06 19:54:29,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 485. [2021-08-06 19:54:29,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 1.8099173553719008) internal successors, (876), 484 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:54:29,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 876 transitions. [2021-08-06 19:54:29,318 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 876 transitions. Word has length 28 [2021-08-06 19:54:29,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:54:29,318 INFO L470 AbstractCegarLoop]: Abstraction has 485 states and 876 transitions. [2021-08-06 19:54:29,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-08-06 19:54:29,318 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 876 transitions. [2021-08-06 19:54:29,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 19:54:29,319 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:54:29,319 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:54:29,341 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2021-08-06 19:54:29,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-08-06 19:54:29,520 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:54:29,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:54:29,520 INFO L82 PathProgramCache]: Analyzing trace with hash 760837390, now seen corresponding path program 56 times [2021-08-06 19:54:29,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:54:29,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797040137] [2021-08-06 19:54:29,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:54:29,521 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:54:29,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:54:29,606 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 55, result has 32.1 percent of original size [2021-08-06 19:54:29,610 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 55, result has 32.1 percent of original size [2021-08-06 19:54:29,639 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 65, result has 14.5 percent of original size [2021-08-06 19:54:29,640 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 65, result has 14.5 percent of original size [2021-08-06 19:54:29,654 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 31.4 percent of original size [2021-08-06 19:54:29,656 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 31.4 percent of original size [2021-08-06 19:54:29,670 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:54:29,670 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:54:29,688 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:54:29,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:54:29,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797040137] [2021-08-06 19:54:29,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797040137] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:54:29,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305810539] [2021-08-06 19:54:29,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:54:29,688 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:54:29,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:54:29,690 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:54:29,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-08-06 19:54:31,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:54:31,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:54:31,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:54:31,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:54:31,901 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:54:31,902 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:54:32,650 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:54:32,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305810539] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:54:32,651 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:54:32,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 19:54:32,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109909564] [2021-08-06 19:54:32,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 19:54:32,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:54:32,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 19:54:32,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:54:32,652 INFO L87 Difference]: Start difference. First operand 485 states and 876 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:54:33,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:54:33,069 INFO L93 Difference]: Finished difference Result 626 states and 1089 transitions. [2021-08-06 19:54:33,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 19:54:33,069 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have 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 [2021-08-06 19:54:33,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:54:33,070 INFO L225 Difference]: With dead ends: 626 [2021-08-06 19:54:33,070 INFO L226 Difference]: Without dead ends: 603 [2021-08-06 19:54:33,071 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 524.4ms TimeCoverageRelationStatistics Valid=185, Invalid=807, Unknown=0, NotChecked=0, Total=992 [2021-08-06 19:54:33,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2021-08-06 19:54:33,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 473. [2021-08-06 19:54:33,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 1.8093220338983051) internal successors, (854), 472 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:54:33,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 854 transitions. [2021-08-06 19:54:33,076 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 854 transitions. Word has length 28 [2021-08-06 19:54:33,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:54:33,076 INFO L470 AbstractCegarLoop]: Abstraction has 473 states and 854 transitions. [2021-08-06 19:54:33,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:54:33,076 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 854 transitions. [2021-08-06 19:54:33,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 19:54:33,080 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:54:33,080 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:54:33,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-08-06 19:54:33,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-08-06 19:54:33,305 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:54:33,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:54:33,305 INFO L82 PathProgramCache]: Analyzing trace with hash 422499854, now seen corresponding path program 57 times [2021-08-06 19:54:33,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:54:33,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571204944] [2021-08-06 19:54:33,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:54:33,305 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:54:33,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:54:33,360 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 77.8 percent of original size [2021-08-06 19:54:33,362 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 77.8 percent of original size [2021-08-06 19:54:33,380 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 104, result has 14.0 percent of original size [2021-08-06 19:54:33,383 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 104, result has 14.0 percent of original size [2021-08-06 19:54:33,404 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 93, result has 25.6 percent of original size [2021-08-06 19:54:33,409 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 93, result has 25.6 percent of original size [2021-08-06 19:54:33,437 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 62, result has 15.1 percent of original size [2021-08-06 19:54:33,439 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 62, result has 15.1 percent of original size [2021-08-06 19:54:33,454 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:54:33,454 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:54:33,473 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:54:33,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:54:33,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571204944] [2021-08-06 19:54:33,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571204944] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:54:33,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78006160] [2021-08-06 19:54:33,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:54:33,473 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:54:33,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:54:33,474 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:54:33,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-08-06 19:54:35,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 19:54:35,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:54:35,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:54:35,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:54:35,744 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:54:35,745 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:54:36,382 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:54:36,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78006160] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:54:36,383 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:54:36,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 19:54:36,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553343105] [2021-08-06 19:54:36,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 19:54:36,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:54:36,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 19:54:36,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:54:36,384 INFO L87 Difference]: Start difference. First operand 473 states and 854 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:54:36,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:54:36,776 INFO L93 Difference]: Finished difference Result 596 states and 1046 transitions. [2021-08-06 19:54:36,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 19:54:36,777 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have 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 [2021-08-06 19:54:36,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:54:36,778 INFO L225 Difference]: With dead ends: 596 [2021-08-06 19:54:36,778 INFO L226 Difference]: Without dead ends: 577 [2021-08-06 19:54:36,778 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 500.4ms TimeCoverageRelationStatistics Valid=194, Invalid=862, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 19:54:36,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-08-06 19:54:36,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 492. [2021-08-06 19:54:36,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 491 states have (on average 1.8065173116089612) internal successors, (887), 491 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:54:36,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 887 transitions. [2021-08-06 19:54:36,783 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 887 transitions. Word has length 28 [2021-08-06 19:54:36,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:54:36,783 INFO L470 AbstractCegarLoop]: Abstraction has 492 states and 887 transitions. [2021-08-06 19:54:36,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:54:36,784 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 887 transitions. [2021-08-06 19:54:36,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 19:54:36,784 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:54:36,784 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:54:36,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-08-06 19:54:36,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:54:36,985 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:54:36,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:54:36,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1042576942, now seen corresponding path program 58 times [2021-08-06 19:54:36,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:54:36,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482810787] [2021-08-06 19:54:36,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:54:36,985 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:54:36,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:54:37,034 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 63.6 percent of original size [2021-08-06 19:54:37,036 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 63.6 percent of original size [2021-08-06 19:54:37,052 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 90, result has 10.9 percent of original size [2021-08-06 19:54:37,054 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 90, result has 10.9 percent of original size [2021-08-06 19:54:37,067 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 96, result has 10.3 percent of original size [2021-08-06 19:54:37,069 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 96, result has 10.3 percent of original size [2021-08-06 19:54:37,083 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 105, result has 9.5 percent of original size [2021-08-06 19:54:37,086 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 105, result has 9.5 percent of original size [2021-08-06 19:54:37,100 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:54:37,101 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:54:37,119 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:54:37,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:54:37,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482810787] [2021-08-06 19:54:37,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482810787] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:54:37,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215991067] [2021-08-06 19:54:37,119 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:54:37,119 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:54:37,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:54:37,120 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:54:37,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-08-06 19:54:39,327 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:54:39,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:54:39,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:54:39,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:54:39,439 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:54:39,441 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:54:39,978 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:54:39,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215991067] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:54:39,979 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:54:39,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 19:54:39,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698357542] [2021-08-06 19:54:39,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 19:54:39,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:54:39,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 19:54:39,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:54:39,979 INFO L87 Difference]: Start difference. First operand 492 states and 887 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-08-06 19:54:40,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:54:40,309 INFO L93 Difference]: Finished difference Result 578 states and 1019 transitions. [2021-08-06 19:54:40,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:54:40,309 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 [2021-08-06 19:54:40,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:54:40,310 INFO L225 Difference]: With dead ends: 578 [2021-08-06 19:54:40,310 INFO L226 Difference]: Without dead ends: 563 [2021-08-06 19:54:40,311 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 423.1ms TimeCoverageRelationStatistics Valid=202, Invalid=728, Unknown=0, NotChecked=0, Total=930 [2021-08-06 19:54:40,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-08-06 19:54:40,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 501. [2021-08-06 19:54:40,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 500 states have (on average 1.8) internal successors, (900), 500 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:54:40,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 900 transitions. [2021-08-06 19:54:40,316 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 900 transitions. Word has length 28 [2021-08-06 19:54:40,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:54:40,316 INFO L470 AbstractCegarLoop]: Abstraction has 501 states and 900 transitions. [2021-08-06 19:54:40,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-08-06 19:54:40,316 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 900 transitions. [2021-08-06 19:54:40,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 19:54:40,317 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:54:40,317 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:54:40,360 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2021-08-06 19:54:40,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-08-06 19:54:40,533 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:54:40,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:54:40,533 INFO L82 PathProgramCache]: Analyzing trace with hash 554207834, now seen corresponding path program 59 times [2021-08-06 19:54:40,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:54:40,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041998519] [2021-08-06 19:54:40,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:54:40,533 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:54:40,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:54:40,618 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 19:54:40,619 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 19:54:40,634 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 87, result has 13.0 percent of original size [2021-08-06 19:54:40,637 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 87, result has 13.0 percent of original size [2021-08-06 19:54:40,653 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:54:40,653 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:54:40,673 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:54:40,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:54:40,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041998519] [2021-08-06 19:54:40,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041998519] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:54:40,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143966806] [2021-08-06 19:54:40,673 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:54:40,673 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:54:40,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:54:40,674 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:54:40,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-08-06 19:54:43,015 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-06 19:54:43,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:54:43,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:54:43,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:54:43,115 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 52.9 percent of original size [2021-08-06 19:54:43,117 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 52.9 percent of original size [2021-08-06 19:54:43,700 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:54:43,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143966806] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:54:43,700 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:54:43,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 19:54:43,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564355179] [2021-08-06 19:54:43,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 19:54:43,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:54:43,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 19:54:43,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:54:43,701 INFO L87 Difference]: Start difference. First operand 501 states and 900 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-08-06 19:54:44,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:54:44,133 INFO L93 Difference]: Finished difference Result 588 states and 1037 transitions. [2021-08-06 19:54:44,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 19:54:44,134 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 [2021-08-06 19:54:44,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:54:44,136 INFO L225 Difference]: With dead ends: 588 [2021-08-06 19:54:44,136 INFO L226 Difference]: Without dead ends: 569 [2021-08-06 19:54:44,136 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 493.3ms TimeCoverageRelationStatistics Valid=172, Invalid=698, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:54:44,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2021-08-06 19:54:44,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 509. [2021-08-06 19:54:44,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 508 states have (on average 1.8070866141732282) internal successors, (918), 508 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:54:44,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 918 transitions. [2021-08-06 19:54:44,143 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 918 transitions. Word has length 28 [2021-08-06 19:54:44,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:54:44,143 INFO L470 AbstractCegarLoop]: Abstraction has 509 states and 918 transitions. [2021-08-06 19:54:44,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-08-06 19:54:44,143 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 918 transitions. [2021-08-06 19:54:44,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 19:54:44,144 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:54:44,144 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:54:44,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-08-06 19:54:44,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-08-06 19:54:44,357 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:54:44,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:54:44,357 INFO L82 PathProgramCache]: Analyzing trace with hash 741898134, now seen corresponding path program 60 times [2021-08-06 19:54:44,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:54:44,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830733291] [2021-08-06 19:54:44,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:54:44,357 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:54:44,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:54:44,441 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 63, result has 14.9 percent of original size [2021-08-06 19:54:44,444 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 63, result has 14.9 percent of original size [2021-08-06 19:54:44,459 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 64.7 percent of original size [2021-08-06 19:54:44,460 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 64.7 percent of original size [2021-08-06 19:54:44,477 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:54:44,478 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:54:44,498 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:54:44,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:54:44,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830733291] [2021-08-06 19:54:44,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830733291] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:54:44,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861295746] [2021-08-06 19:54:44,499 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:54:44,499 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:54:44,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:54:44,500 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:54:44,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-08-06 19:54:46,787 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-06 19:54:46,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:54:46,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:54:46,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:54:46,890 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:54:46,892 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:54:47,500 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:54:47,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861295746] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:54:47,501 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:54:47,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 19:54:47,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672024051] [2021-08-06 19:54:47,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 19:54:47,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:54:47,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 19:54:47,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:54:47,501 INFO L87 Difference]: Start difference. First operand 509 states and 918 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:54:47,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:54:47,833 INFO L93 Difference]: Finished difference Result 616 states and 1081 transitions. [2021-08-06 19:54:47,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 19:54:47,834 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have 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 [2021-08-06 19:54:47,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:54:47,835 INFO L225 Difference]: With dead ends: 616 [2021-08-06 19:54:47,835 INFO L226 Difference]: Without dead ends: 601 [2021-08-06 19:54:47,836 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 463.1ms TimeCoverageRelationStatistics Valid=209, Invalid=783, Unknown=0, NotChecked=0, Total=992 [2021-08-06 19:54:47,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-08-06 19:54:47,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 513. [2021-08-06 19:54:47,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 512 states have (on average 1.810546875) internal successors, (927), 512 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:54:47,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 927 transitions. [2021-08-06 19:54:47,842 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 927 transitions. Word has length 28 [2021-08-06 19:54:47,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:54:47,842 INFO L470 AbstractCegarLoop]: Abstraction has 513 states and 927 transitions. [2021-08-06 19:54:47,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:54:47,842 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 927 transitions. [2021-08-06 19:54:47,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 19:54:47,843 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:54:47,843 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:54:47,865 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2021-08-06 19:54:48,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-08-06 19:54:48,043 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:54:48,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:54:48,044 INFO L82 PathProgramCache]: Analyzing trace with hash 535959702, now seen corresponding path program 61 times [2021-08-06 19:54:48,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:54:48,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203675762] [2021-08-06 19:54:48,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:54:48,044 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:54:48,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:54:48,145 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 61.1 percent of original size [2021-08-06 19:54:48,146 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 61.1 percent of original size [2021-08-06 19:54:48,160 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 84, result has 11.6 percent of original size [2021-08-06 19:54:48,162 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 84, result has 11.6 percent of original size [2021-08-06 19:54:48,177 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:54:48,177 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:54:48,195 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:54:48,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:54:48,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203675762] [2021-08-06 19:54:48,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203675762] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:54:48,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607800552] [2021-08-06 19:54:48,195 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:54:48,195 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:54:48,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:54:48,196 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:54:48,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-08-06 19:54:50,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:54:50,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:54:50,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:54:50,605 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:54:50,607 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:54:51,158 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:54:51,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607800552] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:54:51,159 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:54:51,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 19:54:51,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66628945] [2021-08-06 19:54:51,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 19:54:51,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:54:51,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 19:54:51,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:54:51,159 INFO L87 Difference]: Start difference. First operand 513 states and 927 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-08-06 19:54:51,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:54:51,490 INFO L93 Difference]: Finished difference Result 631 states and 1105 transitions. [2021-08-06 19:54:51,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:54:51,490 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 [2021-08-06 19:54:51,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:54:51,492 INFO L225 Difference]: With dead ends: 631 [2021-08-06 19:54:51,492 INFO L226 Difference]: Without dead ends: 616 [2021-08-06 19:54:51,492 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 448.4ms TimeCoverageRelationStatistics Valid=202, Invalid=728, Unknown=0, NotChecked=0, Total=930 [2021-08-06 19:54:51,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2021-08-06 19:54:51,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 513. [2021-08-06 19:54:51,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 512 states have (on average 1.810546875) internal successors, (927), 512 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:54:51,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 927 transitions. [2021-08-06 19:54:51,499 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 927 transitions. Word has length 28 [2021-08-06 19:54:51,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:54:51,499 INFO L470 AbstractCegarLoop]: Abstraction has 513 states and 927 transitions. [2021-08-06 19:54:51,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-08-06 19:54:51,499 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 927 transitions. [2021-08-06 19:54:51,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 19:54:51,500 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:54:51,500 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:54:51,523 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2021-08-06 19:54:51,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-08-06 19:54:51,701 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:54:51,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:54:51,701 INFO L82 PathProgramCache]: Analyzing trace with hash 2116082198, now seen corresponding path program 62 times [2021-08-06 19:54:51,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:54:51,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049262329] [2021-08-06 19:54:51,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:54:51,701 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:54:51,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:54:51,777 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 23, result has 53.1 percent of original size [2021-08-06 19:54:51,780 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 23, result has 53.1 percent of original size [2021-08-06 19:54:51,810 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 59.0 percent of original size [2021-08-06 19:54:51,813 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 59.0 percent of original size [2021-08-06 19:54:51,832 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 71, result has 24.5 percent of original size [2021-08-06 19:54:51,835 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 71, result has 24.5 percent of original size [2021-08-06 19:54:51,856 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:54:51,857 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:54:51,876 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:54:51,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:54:51,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049262329] [2021-08-06 19:54:51,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049262329] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:54:51,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815880629] [2021-08-06 19:54:51,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:54:51,877 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:54:51,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:54:51,881 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:54:51,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-08-06 19:54:54,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:54:54,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:54:54,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:54:54,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:54:54,352 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:54:54,353 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:54:55,108 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:54:55,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815880629] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:54:55,109 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:54:55,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 19:54:55,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089330891] [2021-08-06 19:54:55,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 19:54:55,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:54:55,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 19:54:55,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:54:55,109 INFO L87 Difference]: Start difference. First operand 513 states and 927 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:54:55,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:54:55,492 INFO L93 Difference]: Finished difference Result 672 states and 1168 transitions. [2021-08-06 19:54:55,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 19:54:55,492 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have 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 [2021-08-06 19:54:55,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:54:55,494 INFO L225 Difference]: With dead ends: 672 [2021-08-06 19:54:55,494 INFO L226 Difference]: Without dead ends: 661 [2021-08-06 19:54:55,494 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 524.1ms TimeCoverageRelationStatistics Valid=185, Invalid=807, Unknown=0, NotChecked=0, Total=992 [2021-08-06 19:54:55,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2021-08-06 19:54:55,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 517. [2021-08-06 19:54:55,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 516 states have (on average 1.813953488372093) internal successors, (936), 516 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:54:55,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 936 transitions. [2021-08-06 19:54:55,502 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 936 transitions. Word has length 28 [2021-08-06 19:54:55,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:54:55,502 INFO L470 AbstractCegarLoop]: Abstraction has 517 states and 936 transitions. [2021-08-06 19:54:55,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:54:55,502 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 936 transitions. [2021-08-06 19:54:55,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 19:54:55,503 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:54:55,503 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:54:55,526 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2021-08-06 19:54:55,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:54:55,703 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:54:55,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:54:55,704 INFO L82 PathProgramCache]: Analyzing trace with hash 385312466, now seen corresponding path program 63 times [2021-08-06 19:54:55,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:54:55,704 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724125508] [2021-08-06 19:54:55,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:54:55,704 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:54:55,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:54:55,783 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 76.5 percent of original size [2021-08-06 19:54:55,786 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 76.5 percent of original size [2021-08-06 19:54:55,816 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 26, result has 29.7 percent of original size [2021-08-06 19:54:55,818 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 26, result has 29.7 percent of original size [2021-08-06 19:54:55,832 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 30.0 percent of original size [2021-08-06 19:54:55,833 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 30.0 percent of original size [2021-08-06 19:54:55,841 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:54:55,841 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:54:55,861 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:54:55,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:54:55,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724125508] [2021-08-06 19:54:55,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724125508] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:54:55,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112582580] [2021-08-06 19:54:55,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:54:55,861 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:54:55,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:54:55,865 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:54:55,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-08-06 19:54:58,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 19:54:58,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:54:58,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:54:58,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:54:58,474 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:54:58,475 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:54:59,192 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:54:59,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112582580] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:54:59,193 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:54:59,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 19:54:59,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377161166] [2021-08-06 19:54:59,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 19:54:59,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:54:59,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 19:54:59,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:54:59,193 INFO L87 Difference]: Start difference. First operand 517 states and 936 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:54:59,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:54:59,548 INFO L93 Difference]: Finished difference Result 674 states and 1179 transitions. [2021-08-06 19:54:59,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:54:59,549 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have 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 [2021-08-06 19:54:59,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:54:59,550 INFO L225 Difference]: With dead ends: 674 [2021-08-06 19:54:59,550 INFO L226 Difference]: Without dead ends: 663 [2021-08-06 19:54:59,550 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 443.5ms TimeCoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2021-08-06 19:54:59,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-08-06 19:54:59,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 521. [2021-08-06 19:54:59,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 520 states have (on average 1.8173076923076923) internal successors, (945), 520 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:54:59,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 945 transitions. [2021-08-06 19:54:59,556 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 945 transitions. Word has length 28 [2021-08-06 19:54:59,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:54:59,557 INFO L470 AbstractCegarLoop]: Abstraction has 521 states and 945 transitions. [2021-08-06 19:54:59,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:54:59,557 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 945 transitions. [2021-08-06 19:54:59,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 19:54:59,557 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:54:59,557 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:54:59,580 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2021-08-06 19:54:59,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:54:59,758 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:54:59,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:54:59,758 INFO L82 PathProgramCache]: Analyzing trace with hash 179374034, now seen corresponding path program 64 times [2021-08-06 19:54:59,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:54:59,758 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161033684] [2021-08-06 19:54:59,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:54:59,758 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:54:59,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:54:59,839 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 52, result has 33.3 percent of original size [2021-08-06 19:54:59,844 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 52, result has 33.3 percent of original size [2021-08-06 19:54:59,872 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 87, result has 11.2 percent of original size [2021-08-06 19:54:59,874 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 87, result has 11.2 percent of original size [2021-08-06 19:54:59,888 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 80, result has 3.6 percent of original size [2021-08-06 19:54:59,889 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 80, result has 3.6 percent of original size [2021-08-06 19:54:59,896 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:54:59,896 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:54:59,914 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:54:59,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:54:59,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161033684] [2021-08-06 19:54:59,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161033684] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:54:59,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44741529] [2021-08-06 19:54:59,915 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:54:59,915 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:54:59,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:54:59,916 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:54:59,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-08-06 19:55:02,417 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:55:02,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:55:02,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:55:02,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:55:02,519 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:55:02,521 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:55:03,131 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:55:03,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44741529] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:55:03,132 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:55:03,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 19:55:03,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962860917] [2021-08-06 19:55:03,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 19:55:03,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:55:03,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 19:55:03,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:55:03,133 INFO L87 Difference]: Start difference. First operand 521 states and 945 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-08-06 19:55:03,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:55:03,528 INFO L93 Difference]: Finished difference Result 647 states and 1136 transitions. [2021-08-06 19:55:03,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 19:55:03,528 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 [2021-08-06 19:55:03,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:55:03,530 INFO L225 Difference]: With dead ends: 647 [2021-08-06 19:55:03,530 INFO L226 Difference]: Without dead ends: 628 [2021-08-06 19:55:03,530 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 463.0ms TimeCoverageRelationStatistics Valid=163, Invalid=707, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:55:03,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2021-08-06 19:55:03,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 529. [2021-08-06 19:55:03,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 528 states have (on average 1.8143939393939394) internal successors, (958), 528 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:55:03,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 958 transitions. [2021-08-06 19:55:03,537 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 958 transitions. Word has length 28 [2021-08-06 19:55:03,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:55:03,537 INFO L470 AbstractCegarLoop]: Abstraction has 529 states and 958 transitions. [2021-08-06 19:55:03,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-08-06 19:55:03,537 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 958 transitions. [2021-08-06 19:55:03,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 19:55:03,538 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:55:03,538 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:55:03,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-08-06 19:55:03,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:55:03,754 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:55:03,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:55:03,754 INFO L82 PathProgramCache]: Analyzing trace with hash 367064334, now seen corresponding path program 65 times [2021-08-06 19:55:03,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:55:03,754 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646456583] [2021-08-06 19:55:03,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:55:03,754 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:55:03,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:55:03,835 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 56, result has 32.5 percent of original size [2021-08-06 19:55:03,839 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 56, result has 32.5 percent of original size [2021-08-06 19:55:03,871 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 76, result has 21.6 percent of original size [2021-08-06 19:55:03,874 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 76, result has 21.6 percent of original size [2021-08-06 19:55:03,899 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 71, result has 13.4 percent of original size [2021-08-06 19:55:03,902 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 71, result has 13.4 percent of original size [2021-08-06 19:55:03,919 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:55:03,919 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:55:03,938 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:55:03,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:55:03,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646456583] [2021-08-06 19:55:03,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646456583] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:55:03,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731429674] [2021-08-06 19:55:03,938 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:55:03,938 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:55:03,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:55:03,939 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:55:03,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-08-06 19:55:06,493 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 19:55:06,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:55:06,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:55:06,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:55:06,593 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:55:06,595 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:55:07,335 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:55:07,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731429674] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:55:07,335 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:55:07,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 19:55:07,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266999941] [2021-08-06 19:55:07,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 19:55:07,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:55:07,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 19:55:07,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:55:07,336 INFO L87 Difference]: Start difference. First operand 529 states and 958 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-08-06 19:55:07,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:55:07,746 INFO L93 Difference]: Finished difference Result 657 states and 1156 transitions. [2021-08-06 19:55:07,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:55:07,747 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 [2021-08-06 19:55:07,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:55:07,748 INFO L225 Difference]: With dead ends: 657 [2021-08-06 19:55:07,748 INFO L226 Difference]: Without dead ends: 638 [2021-08-06 19:55:07,748 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 593.2ms TimeCoverageRelationStatistics Valid=194, Invalid=736, Unknown=0, NotChecked=0, Total=930 [2021-08-06 19:55:07,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-08-06 19:55:07,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 521. [2021-08-06 19:55:07,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 520 states have (on average 1.8173076923076923) internal successors, (945), 520 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:55:07,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 945 transitions. [2021-08-06 19:55:07,753 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 945 transitions. Word has length 28 [2021-08-06 19:55:07,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:55:07,753 INFO L470 AbstractCegarLoop]: Abstraction has 521 states and 945 transitions. [2021-08-06 19:55:07,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-08-06 19:55:07,754 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 945 transitions. [2021-08-06 19:55:07,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 19:55:07,754 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:55:07,754 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:55:07,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2021-08-06 19:55:07,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-08-06 19:55:07,955 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:55:07,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:55:07,955 INFO L82 PathProgramCache]: Analyzing trace with hash -903742698, now seen corresponding path program 66 times [2021-08-06 19:55:07,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:55:07,955 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196013219] [2021-08-06 19:55:07,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:55:07,955 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:55:07,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:55:08,033 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 23, result has 53.1 percent of original size [2021-08-06 19:55:08,036 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 23, result has 53.1 percent of original size [2021-08-06 19:55:08,066 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 23, result has 32.4 percent of original size [2021-08-06 19:55:08,068 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 23, result has 32.4 percent of original size [2021-08-06 19:55:08,083 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 45.8 percent of original size [2021-08-06 19:55:08,084 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 45.8 percent of original size [2021-08-06 19:55:08,100 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:55:08,101 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:55:08,120 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:55:08,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:55:08,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196013219] [2021-08-06 19:55:08,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196013219] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:55:08,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430084527] [2021-08-06 19:55:08,121 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:55:08,121 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:55:08,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:55:08,125 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:55:08,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-08-06 19:55:10,767 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-06 19:55:10,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:55:10,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:55:10,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:55:10,870 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:55:10,872 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:55:11,667 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:55:11,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430084527] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:55:11,667 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:55:11,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 19:55:11,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741685434] [2021-08-06 19:55:11,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 19:55:11,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:55:11,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 19:55:11,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:55:11,668 INFO L87 Difference]: Start difference. First operand 521 states and 945 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:55:12,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:55:12,092 INFO L93 Difference]: Finished difference Result 654 states and 1148 transitions. [2021-08-06 19:55:12,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 19:55:12,092 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have 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 [2021-08-06 19:55:12,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:55:12,093 INFO L225 Difference]: With dead ends: 654 [2021-08-06 19:55:12,093 INFO L226 Difference]: Without dead ends: 635 [2021-08-06 19:55:12,093 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 600.8ms TimeCoverageRelationStatistics Valid=196, Invalid=796, Unknown=0, NotChecked=0, Total=992 [2021-08-06 19:55:12,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-08-06 19:55:12,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 521. [2021-08-06 19:55:12,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 520 states have (on average 1.8173076923076923) internal successors, (945), 520 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:55:12,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 945 transitions. [2021-08-06 19:55:12,099 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 945 transitions. Word has length 28 [2021-08-06 19:55:12,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:55:12,099 INFO L470 AbstractCegarLoop]: Abstraction has 521 states and 945 transitions. [2021-08-06 19:55:12,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:55:12,099 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 945 transitions. [2021-08-06 19:55:12,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 19:55:12,100 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:55:12,100 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:55:12,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2021-08-06 19:55:12,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:55:12,300 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:55:12,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:55:12,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1454516434, now seen corresponding path program 67 times [2021-08-06 19:55:12,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:55:12,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153433336] [2021-08-06 19:55:12,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:55:12,301 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:55:12,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:55:12,379 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 43, result has 37.7 percent of original size [2021-08-06 19:55:12,383 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 43, result has 37.7 percent of original size [2021-08-06 19:55:12,414 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 65, result has 14.5 percent of original size [2021-08-06 19:55:12,417 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 65, result has 14.5 percent of original size [2021-08-06 19:55:12,432 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 60, result has 4.8 percent of original size [2021-08-06 19:55:12,433 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 60, result has 4.8 percent of original size [2021-08-06 19:55:12,441 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:55:12,441 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:55:12,461 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:55:12,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:55:12,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153433336] [2021-08-06 19:55:12,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153433336] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:55:12,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359558026] [2021-08-06 19:55:12,462 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:55:12,462 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:55:12,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:55:12,465 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:55:12,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-08-06 19:55:15,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:55:15,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:55:15,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:55:15,246 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:55:15,247 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:55:15,903 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:55:15,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359558026] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:55:15,904 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:55:15,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 19:55:15,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844645159] [2021-08-06 19:55:15,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 19:55:15,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:55:15,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 19:55:15,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:55:15,904 INFO L87 Difference]: Start difference. First operand 521 states and 945 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-08-06 19:55:16,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:55:16,217 INFO L93 Difference]: Finished difference Result 687 states and 1200 transitions. [2021-08-06 19:55:16,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 19:55:16,218 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 [2021-08-06 19:55:16,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:55:16,219 INFO L225 Difference]: With dead ends: 687 [2021-08-06 19:55:16,219 INFO L226 Difference]: Without dead ends: 668 [2021-08-06 19:55:16,219 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 421.2ms TimeCoverageRelationStatistics Valid=151, Invalid=719, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:55:16,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-08-06 19:55:16,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 529. [2021-08-06 19:55:16,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 528 states have (on average 1.8143939393939394) internal successors, (958), 528 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:55:16,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 958 transitions. [2021-08-06 19:55:16,224 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 958 transitions. Word has length 28 [2021-08-06 19:55:16,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:55:16,225 INFO L470 AbstractCegarLoop]: Abstraction has 529 states and 958 transitions. [2021-08-06 19:55:16,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-08-06 19:55:16,225 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 958 transitions. [2021-08-06 19:55:16,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 19:55:16,225 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:55:16,225 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:55:16,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2021-08-06 19:55:16,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:55:16,426 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:55:16,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:55:16,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1642206734, now seen corresponding path program 68 times [2021-08-06 19:55:16,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:55:16,426 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823211834] [2021-08-06 19:55:16,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:55:16,426 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:55:16,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:55:16,500 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 50.0 percent of original size [2021-08-06 19:55:16,503 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 50.0 percent of original size [2021-08-06 19:55:16,531 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 37, result has 22.9 percent of original size [2021-08-06 19:55:16,532 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 37, result has 22.9 percent of original size [2021-08-06 19:55:16,546 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 65, result has 14.5 percent of original size [2021-08-06 19:55:16,553 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 65, result has 14.5 percent of original size [2021-08-06 19:55:16,574 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:55:16,575 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:55:16,594 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:55:16,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:55:16,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823211834] [2021-08-06 19:55:16,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823211834] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:55:16,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440158589] [2021-08-06 19:55:16,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:55:16,595 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:55:16,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:55:16,602 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:55:16,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-08-06 19:55:19,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:55:19,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:55:19,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:55:19,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:55:19,400 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:55:19,402 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:55:20,235 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:55:20,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440158589] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:55:20,235 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:55:20,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 19:55:20,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015298574] [2021-08-06 19:55:20,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 19:55:20,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:55:20,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 19:55:20,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:55:20,236 INFO L87 Difference]: Start difference. First operand 529 states and 958 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:55:20,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:55:20,669 INFO L93 Difference]: Finished difference Result 708 states and 1239 transitions. [2021-08-06 19:55:20,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 19:55:20,669 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have 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 [2021-08-06 19:55:20,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:55:20,670 INFO L225 Difference]: With dead ends: 708 [2021-08-06 19:55:20,670 INFO L226 Difference]: Without dead ends: 685 [2021-08-06 19:55:20,670 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 589.3ms TimeCoverageRelationStatistics Valid=191, Invalid=801, Unknown=0, NotChecked=0, Total=992 [2021-08-06 19:55:20,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2021-08-06 19:55:20,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 521. [2021-08-06 19:55:20,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 520 states have (on average 1.8173076923076923) internal successors, (945), 520 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:55:20,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 945 transitions. [2021-08-06 19:55:20,677 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 945 transitions. Word has length 28 [2021-08-06 19:55:20,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:55:20,677 INFO L470 AbstractCegarLoop]: Abstraction has 521 states and 945 transitions. [2021-08-06 19:55:20,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:55:20,677 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 945 transitions. [2021-08-06 19:55:20,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 19:55:20,678 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:55:20,678 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:55:20,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2021-08-06 19:55:20,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-08-06 19:55:20,878 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:55:20,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:55:20,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1116178898, now seen corresponding path program 69 times [2021-08-06 19:55:20,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:55:20,879 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423593876] [2021-08-06 19:55:20,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:55:20,879 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:55:20,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:55:20,972 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 38, result has 22.4 percent of original size [2021-08-06 19:55:20,973 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 38, result has 22.4 percent of original size [2021-08-06 19:55:20,988 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 30.0 percent of original size [2021-08-06 19:55:20,989 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 30.0 percent of original size [2021-08-06 19:55:20,997 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:55:20,998 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:55:21,018 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:55:21,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:55:21,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423593876] [2021-08-06 19:55:21,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423593876] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:55:21,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312476100] [2021-08-06 19:55:21,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:55:21,019 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:55:21,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:55:21,021 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:55:21,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-08-06 19:55:23,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 19:55:23,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:55:23,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:55:23,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:55:24,008 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:55:24,010 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:55:24,563 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:55:24,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312476100] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:55:24,564 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:55:24,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 19:55:24,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962034616] [2021-08-06 19:55:24,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 19:55:24,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:55:24,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 19:55:24,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:55:24,564 INFO L87 Difference]: Start difference. First operand 521 states and 945 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:55:24,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:55:24,847 INFO L93 Difference]: Finished difference Result 639 states and 1128 transitions. [2021-08-06 19:55:24,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 19:55:24,848 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have 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 [2021-08-06 19:55:24,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:55:24,849 INFO L225 Difference]: With dead ends: 639 [2021-08-06 19:55:24,849 INFO L226 Difference]: Without dead ends: 620 [2021-08-06 19:55:24,849 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 408.4ms TimeCoverageRelationStatistics Valid=159, Invalid=711, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:55:24,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2021-08-06 19:55:24,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 533. [2021-08-06 19:55:24,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 532 states have (on average 1.8176691729323309) internal successors, (967), 532 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:55:24,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 967 transitions. [2021-08-06 19:55:24,855 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 967 transitions. Word has length 28 [2021-08-06 19:55:24,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:55:24,855 INFO L470 AbstractCegarLoop]: Abstraction has 533 states and 967 transitions. [2021-08-06 19:55:24,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:55:24,855 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 967 transitions. [2021-08-06 19:55:24,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 19:55:24,856 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:55:24,856 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:55:24,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2021-08-06 19:55:25,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-08-06 19:55:25,057 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:55:25,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:55:25,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1303869198, now seen corresponding path program 70 times [2021-08-06 19:55:25,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:55:25,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646130354] [2021-08-06 19:55:25,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:55:25,057 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:55:25,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:55:25,141 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 19:55:25,142 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 19:55:25,156 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 62, result has 15.1 percent of original size [2021-08-06 19:55:25,158 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 62, result has 15.1 percent of original size [2021-08-06 19:55:25,172 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:55:25,173 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:55:25,191 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:55:25,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:55:25,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646130354] [2021-08-06 19:55:25,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646130354] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:55:25,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175558338] [2021-08-06 19:55:25,191 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:55:25,191 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:55:25,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:55:25,192 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:55:25,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-08-06 19:55:27,992 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:55:27,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:55:27,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:55:27,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:55:28,112 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:55:28,114 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:55:28,730 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:55:28,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175558338] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:55:28,731 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:55:28,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 19:55:28,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936208705] [2021-08-06 19:55:28,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 19:55:28,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:55:28,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 19:55:28,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:55:28,731 INFO L87 Difference]: Start difference. First operand 533 states and 967 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-08-06 19:55:29,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:55:29,113 INFO L93 Difference]: Finished difference Result 720 states and 1261 transitions. [2021-08-06 19:55:29,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 19:55:29,113 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 [2021-08-06 19:55:29,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:55:29,114 INFO L225 Difference]: With dead ends: 720 [2021-08-06 19:55:29,114 INFO L226 Difference]: Without dead ends: 697 [2021-08-06 19:55:29,114 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 479.6ms TimeCoverageRelationStatistics Valid=203, Invalid=853, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 19:55:29,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2021-08-06 19:55:29,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 552. [2021-08-06 19:55:29,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 551 states have (on average 1.8148820326678765) internal successors, (1000), 551 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:55:29,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 1000 transitions. [2021-08-06 19:55:29,122 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 1000 transitions. Word has length 28 [2021-08-06 19:55:29,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:55:29,122 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 1000 transitions. [2021-08-06 19:55:29,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-08-06 19:55:29,122 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 1000 transitions. [2021-08-06 19:55:29,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 19:55:29,123 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:55:29,123 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:55:29,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-08-06 19:55:29,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:55:29,329 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:55:29,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:55:29,329 INFO L82 PathProgramCache]: Analyzing trace with hash -161207598, now seen corresponding path program 71 times [2021-08-06 19:55:29,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:55:29,329 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399611497] [2021-08-06 19:55:29,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:55:29,329 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:55:29,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:55:29,463 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 38, result has 22.4 percent of original size [2021-08-06 19:55:29,465 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 38, result has 22.4 percent of original size [2021-08-06 19:55:29,482 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 77, result has 12.5 percent of original size [2021-08-06 19:55:29,485 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 77, result has 12.5 percent of original size [2021-08-06 19:55:29,499 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:55:29,499 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:55:29,517 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:55:29,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:55:29,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399611497] [2021-08-06 19:55:29,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399611497] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:55:29,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764578921] [2021-08-06 19:55:29,518 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:55:29,518 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:55:29,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:55:29,518 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:55:29,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-08-06 19:55:32,341 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 19:55:32,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:55:32,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 19:55:32,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:55:32,441 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:55:32,447 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:55:32,489 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 91.9 percent of original size [2021-08-06 19:55:32,493 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 91.9 percent of original size [2021-08-06 19:55:32,995 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:55:32,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764578921] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:55:32,995 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:55:32,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 19:55:32,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089958322] [2021-08-06 19:55:32,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 19:55:32,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:55:32,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 19:55:32,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:55:32,996 INFO L87 Difference]: Start difference. First operand 552 states and 1000 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-08-06 19:55:33,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:55:33,325 INFO L93 Difference]: Finished difference Result 650 states and 1154 transitions. [2021-08-06 19:55:33,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:55:33,325 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 [2021-08-06 19:55:33,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:55:33,326 INFO L225 Difference]: With dead ends: 650 [2021-08-06 19:55:33,326 INFO L226 Difference]: Without dead ends: 635 [2021-08-06 19:55:33,326 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 445.2ms TimeCoverageRelationStatistics Valid=186, Invalid=744, Unknown=0, NotChecked=0, Total=930 [2021-08-06 19:55:33,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-08-06 19:55:33,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 552. [2021-08-06 19:55:33,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 551 states have (on average 1.8148820326678765) internal successors, (1000), 551 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:55:33,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 1000 transitions. [2021-08-06 19:55:33,331 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 1000 transitions. Word has length 28 [2021-08-06 19:55:33,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:55:33,332 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 1000 transitions. [2021-08-06 19:55:33,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-08-06 19:55:33,332 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 1000 transitions. [2021-08-06 19:55:33,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 19:55:33,332 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:55:33,332 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:55:33,355 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2021-08-06 19:55:33,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:55:33,533 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:55:33,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:55:33,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1476035690, now seen corresponding path program 72 times [2021-08-06 19:55:33,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:55:33,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386699707] [2021-08-06 19:55:33,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:55:33,534 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:55:33,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:55:33,591 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 58, result has 14.7 percent of original size [2021-08-06 19:55:33,592 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 58, result has 14.7 percent of original size [2021-08-06 19:55:33,604 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 58, result has 14.7 percent of original size [2021-08-06 19:55:33,606 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 58, result has 14.7 percent of original size [2021-08-06 19:55:33,620 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 66, result has 42.6 percent of original size [2021-08-06 19:55:33,626 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 66, result has 42.6 percent of original size [2021-08-06 19:55:33,667 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 58, result has 15.9 percent of original size [2021-08-06 19:55:33,669 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 58, result has 15.9 percent of original size [2021-08-06 19:55:33,684 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 49, result has 23.4 percent of original size [2021-08-06 19:55:33,686 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 49, result has 23.4 percent of original size [2021-08-06 19:55:33,704 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:55:33,705 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:55:33,724 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:55:33,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:55:33,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386699707] [2021-08-06 19:55:33,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386699707] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:55:33,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306178242] [2021-08-06 19:55:33,724 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:55:33,724 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:55:33,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:55:33,729 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:55:33,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-08-06 19:55:36,634 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-06 19:55:36,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:55:36,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:55:36,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:55:36,797 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 57.9 percent of original size [2021-08-06 19:55:36,799 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 57.9 percent of original size [2021-08-06 19:55:37,340 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:55:37,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306178242] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:55:37,341 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:55:37,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 19:55:37,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492091418] [2021-08-06 19:55:37,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 19:55:37,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:55:37,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 19:55:37,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:55:37,341 INFO L87 Difference]: Start difference. First operand 552 states and 1000 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:55:38,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:55:38,011 INFO L93 Difference]: Finished difference Result 699 states and 1234 transitions. [2021-08-06 19:55:38,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 19:55:38,012 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have 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 [2021-08-06 19:55:38,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:55:38,013 INFO L225 Difference]: With dead ends: 699 [2021-08-06 19:55:38,013 INFO L226 Difference]: Without dead ends: 684 [2021-08-06 19:55:38,013 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 777.1ms TimeCoverageRelationStatistics Valid=276, Invalid=1130, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 19:55:38,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2021-08-06 19:55:38,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 552. [2021-08-06 19:55:38,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 551 states have (on average 1.8148820326678765) internal successors, (1000), 551 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:55:38,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 1000 transitions. [2021-08-06 19:55:38,018 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 1000 transitions. Word has length 28 [2021-08-06 19:55:38,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:55:38,018 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 1000 transitions. [2021-08-06 19:55:38,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:55:38,018 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 1000 transitions. [2021-08-06 19:55:38,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 19:55:38,019 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:55:38,019 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:55:38,042 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2021-08-06 19:55:38,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2021-08-06 19:55:38,219 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:55:38,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:55:38,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1494283822, now seen corresponding path program 73 times [2021-08-06 19:55:38,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:55:38,220 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584627667] [2021-08-06 19:55:38,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:55:38,220 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:55:38,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:55:38,266 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 34.1 percent of original size [2021-08-06 19:55:38,268 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 34.1 percent of original size [2021-08-06 19:55:38,283 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 34.1 percent of original size [2021-08-06 19:55:38,286 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 34.1 percent of original size [2021-08-06 19:55:38,303 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 98, result has 25.2 percent of original size [2021-08-06 19:55:38,308 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 98, result has 25.2 percent of original size [2021-08-06 19:55:38,340 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 56, result has 16.4 percent of original size [2021-08-06 19:55:38,342 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 56, result has 16.4 percent of original size [2021-08-06 19:55:38,357 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 12.5 percent of original size [2021-08-06 19:55:38,357 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 12.5 percent of original size [2021-08-06 19:55:38,365 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:55:38,366 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:55:38,384 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:55:38,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:55:38,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584627667] [2021-08-06 19:55:38,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584627667] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:55:38,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286701486] [2021-08-06 19:55:38,384 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:55:38,384 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:55:38,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:55:38,386 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:55:38,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-08-06 19:55:41,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:55:41,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:55:41,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:55:41,479 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 19:55:41,482 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 19:55:42,074 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:55:42,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286701486] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:55:42,074 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:55:42,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 19:55:42,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606388931] [2021-08-06 19:55:42,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 19:55:42,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:55:42,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 19:55:42,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:55:42,075 INFO L87 Difference]: Start difference. First operand 552 states and 1000 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-08-06 19:55:42,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:55:42,463 INFO L93 Difference]: Finished difference Result 703 states and 1235 transitions. [2021-08-06 19:55:42,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 19:55:42,463 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 [2021-08-06 19:55:42,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:55:42,464 INFO L225 Difference]: With dead ends: 703 [2021-08-06 19:55:42,464 INFO L226 Difference]: Without dead ends: 684 [2021-08-06 19:55:42,464 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 456.4ms TimeCoverageRelationStatistics Valid=152, Invalid=718, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:55:42,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2021-08-06 19:55:42,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 552. [2021-08-06 19:55:42,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 551 states have (on average 1.8148820326678765) internal successors, (1000), 551 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:55:42,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 1000 transitions. [2021-08-06 19:55:42,469 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 1000 transitions. Word has length 28 [2021-08-06 19:55:42,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:55:42,470 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 1000 transitions. [2021-08-06 19:55:42,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-08-06 19:55:42,470 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 1000 transitions. [2021-08-06 19:55:42,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 19:55:42,470 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:55:42,470 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:55:42,493 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2021-08-06 19:55:42,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:55:42,671 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:55:42,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:55:42,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1306593522, now seen corresponding path program 74 times [2021-08-06 19:55:42,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:55:42,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595173557] [2021-08-06 19:55:42,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:55:42,672 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:55:42,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:55:42,716 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 129, result has 9.8 percent of original size [2021-08-06 19:55:42,718 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 129, result has 9.8 percent of original size [2021-08-06 19:55:42,734 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 129, result has 9.8 percent of original size [2021-08-06 19:55:42,736 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 129, result has 9.8 percent of original size [2021-08-06 19:55:42,751 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 126, result has 17.1 percent of original size [2021-08-06 19:55:42,755 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 126, result has 17.1 percent of original size [2021-08-06 19:55:42,782 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 187, result has 5.6 percent of original size [2021-08-06 19:55:42,783 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 187, result has 5.6 percent of original size [2021-08-06 19:55:42,797 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 112, result has 8.9 percent of original size [2021-08-06 19:55:42,798 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 112, result has 8.9 percent of original size [2021-08-06 19:55:42,812 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:55:42,813 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:55:42,830 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:55:42,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:55:42,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595173557] [2021-08-06 19:55:42,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595173557] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:55:42,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143341049] [2021-08-06 19:55:42,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:55:42,830 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:55:42,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:55:42,831 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:55:42,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-08-06 19:55:45,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:55:45,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:55:45,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:55:45,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:55:45,984 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 19:55:45,987 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 19:55:46,687 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:55:46,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143341049] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:55:46,687 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:55:46,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 19:55:46,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096718037] [2021-08-06 19:55:46,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 19:55:46,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:55:46,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 19:55:46,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:55:46,688 INFO L87 Difference]: Start difference. First operand 552 states and 1000 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:55:47,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:55:47,134 INFO L93 Difference]: Finished difference Result 705 states and 1246 transitions. [2021-08-06 19:55:47,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 19:55:47,135 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have 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 [2021-08-06 19:55:47,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:55:47,136 INFO L225 Difference]: With dead ends: 705 [2021-08-06 19:55:47,136 INFO L226 Difference]: Without dead ends: 694 [2021-08-06 19:55:47,136 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 578.3ms TimeCoverageRelationStatistics Valid=196, Invalid=796, Unknown=0, NotChecked=0, Total=992 [2021-08-06 19:55:47,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2021-08-06 19:55:47,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 536. [2021-08-06 19:55:47,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 535 states have (on average 1.8205607476635515) internal successors, (974), 535 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:55:47,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 974 transitions. [2021-08-06 19:55:47,141 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 974 transitions. Word has length 28 [2021-08-06 19:55:47,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:55:47,141 INFO L470 AbstractCegarLoop]: Abstraction has 536 states and 974 transitions. [2021-08-06 19:55:47,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:55:47,141 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 974 transitions. [2021-08-06 19:55:47,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 19:55:47,142 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:55:47,142 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:55:47,165 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2021-08-06 19:55:47,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:55:47,343 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:55:47,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:55:47,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1832621358, now seen corresponding path program 75 times [2021-08-06 19:55:47,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:55:47,346 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780204284] [2021-08-06 19:55:47,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:55:47,346 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:55:47,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:55:47,405 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 34.1 percent of original size [2021-08-06 19:55:47,407 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 34.1 percent of original size [2021-08-06 19:55:47,422 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 34.1 percent of original size [2021-08-06 19:55:47,424 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 34.1 percent of original size [2021-08-06 19:55:47,440 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 94, result has 6.9 percent of original size [2021-08-06 19:55:47,442 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 94, result has 6.9 percent of original size [2021-08-06 19:55:47,453 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 64, result has 14.7 percent of original size [2021-08-06 19:55:47,454 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 64, result has 14.7 percent of original size [2021-08-06 19:55:47,469 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 12.5 percent of original size [2021-08-06 19:55:47,469 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 12.5 percent of original size [2021-08-06 19:55:47,477 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:55:47,478 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:55:47,497 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:55:47,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:55:47,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780204284] [2021-08-06 19:55:47,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780204284] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:55:47,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074035042] [2021-08-06 19:55:47,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:55:47,498 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:55:47,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:55:47,501 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:55:47,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-08-06 19:55:50,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 19:55:50,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:55:50,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:55:50,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:55:50,792 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 19:55:50,795 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 19:55:51,231 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:55:51,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074035042] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:55:51,231 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:55:51,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 19:55:51,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529237539] [2021-08-06 19:55:51,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 19:55:51,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:55:51,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 19:55:51,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:55:51,232 INFO L87 Difference]: Start difference. First operand 536 states and 974 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:55:51,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:55:51,549 INFO L93 Difference]: Finished difference Result 667 states and 1181 transitions. [2021-08-06 19:55:51,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:55:51,549 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have 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 [2021-08-06 19:55:51,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:55:51,550 INFO L225 Difference]: With dead ends: 667 [2021-08-06 19:55:51,550 INFO L226 Difference]: Without dead ends: 648 [2021-08-06 19:55:51,551 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 386.3ms TimeCoverageRelationStatistics Valid=161, Invalid=769, Unknown=0, NotChecked=0, Total=930 [2021-08-06 19:55:51,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2021-08-06 19:55:51,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 548. [2021-08-06 19:55:51,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 1.8208409506398537) internal successors, (996), 547 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:55:51,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 996 transitions. [2021-08-06 19:55:51,556 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 996 transitions. Word has length 28 [2021-08-06 19:55:51,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:55:51,556 INFO L470 AbstractCegarLoop]: Abstraction has 548 states and 996 transitions. [2021-08-06 19:55:51,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:55:51,556 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 996 transitions. [2021-08-06 19:55:51,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 19:55:51,557 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:55:51,557 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:55:51,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2021-08-06 19:55:51,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-08-06 19:55:51,758 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:55:51,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:55:51,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1644931058, now seen corresponding path program 76 times [2021-08-06 19:55:51,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:55:51,758 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159761835] [2021-08-06 19:55:51,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:55:51,758 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:55:51,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:55:51,803 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 156, result has 8.2 percent of original size [2021-08-06 19:55:51,806 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 156, result has 8.2 percent of original size [2021-08-06 19:55:51,821 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 156, result has 8.2 percent of original size [2021-08-06 19:55:51,823 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 156, result has 8.2 percent of original size [2021-08-06 19:55:51,840 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 55, result has 11.3 percent of original size [2021-08-06 19:55:51,841 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 55, result has 11.3 percent of original size [2021-08-06 19:55:51,851 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 60, result has 15.5 percent of original size [2021-08-06 19:55:51,852 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 60, result has 15.5 percent of original size [2021-08-06 19:55:51,866 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 104, result has 9.6 percent of original size [2021-08-06 19:55:51,867 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 104, result has 9.6 percent of original size [2021-08-06 19:55:51,882 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:55:51,883 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:55:51,900 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:55:51,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:55:51,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159761835] [2021-08-06 19:55:51,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159761835] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:55:51,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749915294] [2021-08-06 19:55:51,901 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:55:51,901 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:55:51,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:55:51,902 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:55:51,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-08-06 19:55:55,060 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:55:55,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:55:55,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:55:55,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:55:55,239 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 19:55:55,243 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 19:55:55,907 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:55:55,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749915294] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:55:55,907 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:55:55,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 19:55:55,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370268253] [2021-08-06 19:55:55,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 19:55:55,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:55:55,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 19:55:55,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:55:55,917 INFO L87 Difference]: Start difference. First operand 548 states and 996 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-08-06 19:55:56,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:55:56,334 INFO L93 Difference]: Finished difference Result 713 states and 1259 transitions. [2021-08-06 19:55:56,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 19:55:56,335 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 [2021-08-06 19:55:56,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:55:56,336 INFO L225 Difference]: With dead ends: 713 [2021-08-06 19:55:56,336 INFO L226 Difference]: Without dead ends: 690 [2021-08-06 19:55:56,336 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 540.4ms TimeCoverageRelationStatistics Valid=211, Invalid=911, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 19:55:56,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2021-08-06 19:55:56,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 556. [2021-08-06 19:55:56,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 555 states have (on average 1.818018018018018) internal successors, (1009), 555 states have internal predecessors, (1009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:55:56,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 1009 transitions. [2021-08-06 19:55:56,343 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 1009 transitions. Word has length 28 [2021-08-06 19:55:56,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:55:56,343 INFO L470 AbstractCegarLoop]: Abstraction has 556 states and 1009 transitions. [2021-08-06 19:55:56,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-08-06 19:55:56,343 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 1009 transitions. [2021-08-06 19:55:56,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 19:55:56,344 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:55:56,344 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:55:56,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2021-08-06 19:55:56,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:55:56,557 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:55:56,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:55:56,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1184959442, now seen corresponding path program 77 times [2021-08-06 19:55:56,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:55:56,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43938858] [2021-08-06 19:55:56,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:55:56,557 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:55:56,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:55:56,601 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 31, result has 35.4 percent of original size [2021-08-06 19:55:56,603 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 31, result has 35.4 percent of original size [2021-08-06 19:55:56,622 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 31, result has 31.1 percent of original size [2021-08-06 19:55:56,624 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 31, result has 31.1 percent of original size [2021-08-06 19:55:56,640 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 19:55:56,641 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 19:55:56,655 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 42.3 percent of original size [2021-08-06 19:55:56,656 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 42.3 percent of original size [2021-08-06 19:55:56,672 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 34.4 percent of original size [2021-08-06 19:55:56,673 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 34.4 percent of original size [2021-08-06 19:55:56,689 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:55:56,690 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:55:56,710 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:55:56,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:55:56,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43938858] [2021-08-06 19:55:56,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43938858] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:55:56,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82378838] [2021-08-06 19:55:56,711 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:55:56,712 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:55:56,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:55:56,713 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:55:56,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-08-06 19:55:59,903 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-06 19:55:59,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:55:59,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:55:59,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:56:00,062 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 19:56:00,065 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 19:56:00,655 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:56:00,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82378838] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:00,655 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:56:00,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 19:56:00,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827520034] [2021-08-06 19:56:00,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 19:56:00,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:56:00,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 19:56:00,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:56:00,656 INFO L87 Difference]: Start difference. First operand 556 states and 1009 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-08-06 19:56:00,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:56:00,988 INFO L93 Difference]: Finished difference Result 678 states and 1202 transitions. [2021-08-06 19:56:00,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:56:00,989 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 [2021-08-06 19:56:00,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:56:00,990 INFO L225 Difference]: With dead ends: 678 [2021-08-06 19:56:00,990 INFO L226 Difference]: Without dead ends: 663 [2021-08-06 19:56:00,990 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 472.3ms TimeCoverageRelationStatistics Valid=184, Invalid=746, Unknown=0, NotChecked=0, Total=930 [2021-08-06 19:56:00,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-08-06 19:56:00,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 548. [2021-08-06 19:56:00,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 1.8208409506398537) internal successors, (996), 547 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:00,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 996 transitions. [2021-08-06 19:56:00,997 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 996 transitions. Word has length 28 [2021-08-06 19:56:00,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:56:00,997 INFO L470 AbstractCegarLoop]: Abstraction has 548 states and 996 transitions. [2021-08-06 19:56:00,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-08-06 19:56:00,997 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 996 transitions. [2021-08-06 19:56:00,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 19:56:00,998 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:56:00,998 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:56:01,021 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2021-08-06 19:56:01,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:56:01,198 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:56:01,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:56:01,198 INFO L82 PathProgramCache]: Analyzing trace with hash -369788658, now seen corresponding path program 78 times [2021-08-06 19:56:01,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:56:01,198 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370307949] [2021-08-06 19:56:01,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:56:01,199 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:56:01,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:56:01,241 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 55.6 percent of original size [2021-08-06 19:56:01,243 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 55.6 percent of original size [2021-08-06 19:56:01,258 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 19:56:01,259 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 19:56:01,281 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 50, result has 18.0 percent of original size [2021-08-06 19:56:01,282 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 50, result has 18.0 percent of original size [2021-08-06 19:56:01,296 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 56, result has 16.4 percent of original size [2021-08-06 19:56:01,298 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 56, result has 16.4 percent of original size [2021-08-06 19:56:01,312 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:56:01,313 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:56:01,330 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:56:01,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:56:01,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370307949] [2021-08-06 19:56:01,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370307949] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:01,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137542794] [2021-08-06 19:56:01,331 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:56:01,331 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:56:01,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:56:01,333 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:56:01,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-08-06 19:56:04,539 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 19:56:04,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:56:04,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:56:04,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:56:04,790 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 19:56:04,793 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 19:56:05,399 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:56:05,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137542794] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:05,399 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:56:05,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 19:56:05,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501097536] [2021-08-06 19:56:05,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 19:56:05,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:56:05,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 19:56:05,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:56:05,400 INFO L87 Difference]: Start difference. First operand 548 states and 996 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:05,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:56:05,768 INFO L93 Difference]: Finished difference Result 673 states and 1185 transitions. [2021-08-06 19:56:05,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 19:56:05,768 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have 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 [2021-08-06 19:56:05,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:56:05,769 INFO L225 Difference]: With dead ends: 673 [2021-08-06 19:56:05,769 INFO L226 Difference]: Without dead ends: 662 [2021-08-06 19:56:05,769 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 497.1ms TimeCoverageRelationStatistics Valid=222, Invalid=900, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 19:56:05,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-08-06 19:56:05,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 548. [2021-08-06 19:56:05,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 1.8208409506398537) internal successors, (996), 547 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:05,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 996 transitions. [2021-08-06 19:56:05,774 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 996 transitions. Word has length 28 [2021-08-06 19:56:05,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:56:05,775 INFO L470 AbstractCegarLoop]: Abstraction has 548 states and 996 transitions. [2021-08-06 19:56:05,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:05,775 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 996 transitions. [2021-08-06 19:56:05,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 19:56:05,775 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:56:05,775 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:56:05,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2021-08-06 19:56:05,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-08-06 19:56:05,976 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:56:05,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:56:05,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1834865454, now seen corresponding path program 79 times [2021-08-06 19:56:05,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:56:05,976 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920093817] [2021-08-06 19:56:05,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:56:05,977 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:56:05,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:56:06,027 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 70.4 percent of original size [2021-08-06 19:56:06,029 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 70.4 percent of original size [2021-08-06 19:56:06,143 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 61.1 percent of original size [2021-08-06 19:56:06,145 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 61.1 percent of original size [2021-08-06 19:56:06,160 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 49, result has 18.3 percent of original size [2021-08-06 19:56:06,162 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 49, result has 18.3 percent of original size [2021-08-06 19:56:06,176 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:56:06,176 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:56:06,196 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:56:06,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:56:06,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920093817] [2021-08-06 19:56:06,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920093817] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:06,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495964227] [2021-08-06 19:56:06,197 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:56:06,197 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:56:06,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:56:06,197 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:56:06,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-08-06 19:56:09,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:56:09,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:56:09,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:56:09,669 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 19:56:09,671 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 19:56:10,156 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:56:10,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495964227] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:10,156 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:56:10,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 19:56:10,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865880306] [2021-08-06 19:56:10,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 19:56:10,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:56:10,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 19:56:10,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:56:10,157 INFO L87 Difference]: Start difference. First operand 548 states and 996 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-08-06 19:56:10,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:56:10,622 INFO L93 Difference]: Finished difference Result 697 states and 1226 transitions. [2021-08-06 19:56:10,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 19:56:10,623 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 [2021-08-06 19:56:10,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:56:10,624 INFO L225 Difference]: With dead ends: 697 [2021-08-06 19:56:10,624 INFO L226 Difference]: Without dead ends: 682 [2021-08-06 19:56:10,624 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 567.8ms TimeCoverageRelationStatistics Valid=219, Invalid=903, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 19:56:10,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2021-08-06 19:56:10,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 554. [2021-08-06 19:56:10,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 553 states have (on average 1.8191681735985534) internal successors, (1006), 553 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:10,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 1006 transitions. [2021-08-06 19:56:10,630 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 1006 transitions. Word has length 28 [2021-08-06 19:56:10,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:56:10,630 INFO L470 AbstractCegarLoop]: Abstraction has 554 states and 1006 transitions. [2021-08-06 19:56:10,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-08-06 19:56:10,630 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 1006 transitions. [2021-08-06 19:56:10,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 19:56:10,630 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:56:10,630 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:56:10,655 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2021-08-06 19:56:10,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:56:10,831 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:56:10,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:56:10,831 INFO L82 PathProgramCache]: Analyzing trace with hash -575727090, now seen corresponding path program 80 times [2021-08-06 19:56:10,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:56:10,831 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379339185] [2021-08-06 19:56:10,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:56:10,832 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:56:10,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:56:10,879 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 55.6 percent of original size [2021-08-06 19:56:10,881 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 55.6 percent of original size [2021-08-06 19:56:10,898 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 19:56:10,899 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 19:56:10,924 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.0 percent of original size [2021-08-06 19:56:10,927 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.0 percent of original size [2021-08-06 19:56:10,947 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 51, result has 17.7 percent of original size [2021-08-06 19:56:10,949 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 51, result has 17.7 percent of original size [2021-08-06 19:56:10,966 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:56:10,966 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:56:10,985 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:56:10,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:56:10,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379339185] [2021-08-06 19:56:10,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379339185] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:10,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238345417] [2021-08-06 19:56:10,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:56:10,986 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:56:10,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:56:10,986 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:56:10,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-08-06 19:56:14,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:56:14,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:56:14,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:56:14,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:56:14,541 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 19:56:14,544 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 19:56:14,910 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:56:14,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238345417] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:14,910 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:56:14,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 19:56:14,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225054280] [2021-08-06 19:56:14,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 19:56:14,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:56:14,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 19:56:14,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:56:14,911 INFO L87 Difference]: Start difference. First operand 554 states and 1006 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:15,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:56:15,288 INFO L93 Difference]: Finished difference Result 724 states and 1277 transitions. [2021-08-06 19:56:15,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 19:56:15,288 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have 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 [2021-08-06 19:56:15,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:56:15,289 INFO L225 Difference]: With dead ends: 724 [2021-08-06 19:56:15,289 INFO L226 Difference]: Without dead ends: 709 [2021-08-06 19:56:15,289 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 482.0ms TimeCoverageRelationStatistics Valid=254, Invalid=1006, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 19:56:15,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2021-08-06 19:56:15,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 570. [2021-08-06 19:56:15,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 569 states have (on average 1.820738137082601) internal successors, (1036), 569 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:15,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 1036 transitions. [2021-08-06 19:56:15,295 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 1036 transitions. Word has length 28 [2021-08-06 19:56:15,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:56:15,295 INFO L470 AbstractCegarLoop]: Abstraction has 570 states and 1036 transitions. [2021-08-06 19:56:15,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:15,295 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 1036 transitions. [2021-08-06 19:56:15,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 19:56:15,296 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:56:15,296 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:56:15,321 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2021-08-06 19:56:15,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:56:15,496 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:56:15,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:56:15,497 INFO L82 PathProgramCache]: Analyzing trace with hash -388036790, now seen corresponding path program 81 times [2021-08-06 19:56:15,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:56:15,497 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506905608] [2021-08-06 19:56:15,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:56:15,497 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:56:15,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:56:15,562 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 70.4 percent of original size [2021-08-06 19:56:15,565 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 70.4 percent of original size [2021-08-06 19:56:15,616 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 26, result has 29.7 percent of original size [2021-08-06 19:56:15,618 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 26, result has 29.7 percent of original size [2021-08-06 19:56:15,631 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 30.0 percent of original size [2021-08-06 19:56:15,631 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 30.0 percent of original size [2021-08-06 19:56:15,639 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:56:15,639 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:56:15,657 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:56:15,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:56:15,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506905608] [2021-08-06 19:56:15,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506905608] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:15,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252658236] [2021-08-06 19:56:15,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:56:15,658 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:56:15,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:56:15,659 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:56:15,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-08-06 19:56:19,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-06 19:56:19,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:56:19,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:56:19,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:56:19,269 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 19:56:19,272 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 19:56:19,686 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:56:19,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252658236] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:19,686 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:56:19,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 19:56:19,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042137032] [2021-08-06 19:56:19,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 19:56:19,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:56:19,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 19:56:19,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:56:19,687 INFO L87 Difference]: Start difference. First operand 570 states and 1036 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:19,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:56:19,981 INFO L93 Difference]: Finished difference Result 666 states and 1184 transitions. [2021-08-06 19:56:19,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 19:56:19,982 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have 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 [2021-08-06 19:56:19,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:56:19,983 INFO L225 Difference]: With dead ends: 666 [2021-08-06 19:56:19,983 INFO L226 Difference]: Without dead ends: 651 [2021-08-06 19:56:19,983 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 399.0ms TimeCoverageRelationStatistics Valid=151, Invalid=719, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:56:19,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2021-08-06 19:56:19,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 586. [2021-08-06 19:56:19,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 1.8153846153846154) internal successors, (1062), 585 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:19,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1062 transitions. [2021-08-06 19:56:19,988 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1062 transitions. Word has length 28 [2021-08-06 19:56:19,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:56:19,988 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 1062 transitions. [2021-08-06 19:56:19,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:19,989 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1062 transitions. [2021-08-06 19:56:19,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 19:56:19,989 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:56:19,989 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:56:20,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2021-08-06 19:56:20,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:56:20,190 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:56:20,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:56:20,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1004395406, now seen corresponding path program 82 times [2021-08-06 19:56:20,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:56:20,190 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217326968] [2021-08-06 19:56:20,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:56:20,190 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:56:20,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:56:20,235 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 70, result has 27.1 percent of original size [2021-08-06 19:56:20,238 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 70, result has 27.1 percent of original size [2021-08-06 19:56:20,262 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 35, result has 28.6 percent of original size [2021-08-06 19:56:20,264 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 35, result has 28.6 percent of original size [2021-08-06 19:56:20,281 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 30, result has 33.3 percent of original size [2021-08-06 19:56:20,282 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 30, result has 33.3 percent of original size [2021-08-06 19:56:20,299 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 68, result has 13.9 percent of original size [2021-08-06 19:56:20,301 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 68, result has 13.9 percent of original size [2021-08-06 19:56:20,314 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 31.4 percent of original size [2021-08-06 19:56:20,315 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 31.4 percent of original size [2021-08-06 19:56:20,329 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:56:20,330 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:56:20,347 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:56:20,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:56:20,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217326968] [2021-08-06 19:56:20,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217326968] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:20,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599958874] [2021-08-06 19:56:20,347 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:56:20,347 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:56:20,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:56:20,348 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:56:20,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-08-06 19:56:23,728 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:56:23,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:56:23,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:56:23,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:56:24,078 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 73.3 percent of original size [2021-08-06 19:56:24,082 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 73.3 percent of original size [2021-08-06 19:56:24,482 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:56:24,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599958874] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:24,482 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:56:24,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 19:56:24,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027212078] [2021-08-06 19:56:24,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 19:56:24,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:56:24,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 19:56:24,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:56:24,483 INFO L87 Difference]: Start difference. First operand 586 states and 1062 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-08-06 19:56:24,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:56:24,884 INFO L93 Difference]: Finished difference Result 696 states and 1228 transitions. [2021-08-06 19:56:24,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 19:56:24,884 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 [2021-08-06 19:56:24,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:56:24,885 INFO L225 Difference]: With dead ends: 696 [2021-08-06 19:56:24,885 INFO L226 Difference]: Without dead ends: 685 [2021-08-06 19:56:24,886 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 508.0ms TimeCoverageRelationStatistics Valid=207, Invalid=915, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 19:56:24,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2021-08-06 19:56:24,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 586. [2021-08-06 19:56:24,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 1.8153846153846154) internal successors, (1062), 585 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:24,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1062 transitions. [2021-08-06 19:56:24,894 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1062 transitions. Word has length 28 [2021-08-06 19:56:24,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:56:24,894 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 1062 transitions. [2021-08-06 19:56:24,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-08-06 19:56:24,894 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1062 transitions. [2021-08-06 19:56:24,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 19:56:24,895 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:56:24,895 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:56:24,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2021-08-06 19:56:25,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2021-08-06 19:56:25,109 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:56:25,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:56:25,109 INFO L82 PathProgramCache]: Analyzing trace with hash -726374326, now seen corresponding path program 83 times [2021-08-06 19:56:25,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:56:25,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20951212] [2021-08-06 19:56:25,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:56:25,109 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:56:25,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:56:25,154 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 74, result has 25.3 percent of original size [2021-08-06 19:56:25,157 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 74, result has 25.3 percent of original size [2021-08-06 19:56:25,179 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 47, result has 23.0 percent of original size [2021-08-06 19:56:25,181 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 47, result has 23.0 percent of original size [2021-08-06 19:56:25,197 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 45, result has 25.0 percent of original size [2021-08-06 19:56:25,199 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 45, result has 25.0 percent of original size [2021-08-06 19:56:25,215 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 80, result has 12.1 percent of original size [2021-08-06 19:56:25,217 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 80, result has 12.1 percent of original size [2021-08-06 19:56:25,230 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 12.5 percent of original size [2021-08-06 19:56:25,230 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 12.5 percent of original size [2021-08-06 19:56:25,237 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:56:25,238 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:56:25,256 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:56:25,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:56:25,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20951212] [2021-08-06 19:56:25,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20951212] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:25,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45595685] [2021-08-06 19:56:25,256 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:56:25,256 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:56:25,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:56:25,257 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:56:25,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-08-06 19:56:28,713 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-06 19:56:28,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:56:28,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:56:28,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:56:29,071 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 73.3 percent of original size [2021-08-06 19:56:29,075 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 73.3 percent of original size [2021-08-06 19:56:29,393 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:56:29,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45595685] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:29,393 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:56:29,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 19:56:29,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142037060] [2021-08-06 19:56:29,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 19:56:29,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:56:29,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 19:56:29,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:56:29,394 INFO L87 Difference]: Start difference. First operand 586 states and 1062 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-08-06 19:56:29,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:56:29,723 INFO L93 Difference]: Finished difference Result 689 states and 1220 transitions. [2021-08-06 19:56:29,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 19:56:29,724 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 [2021-08-06 19:56:29,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:56:29,725 INFO L225 Difference]: With dead ends: 689 [2021-08-06 19:56:29,725 INFO L226 Difference]: Without dead ends: 678 [2021-08-06 19:56:29,725 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 430.8ms TimeCoverageRelationStatistics Valid=166, Invalid=826, Unknown=0, NotChecked=0, Total=992 [2021-08-06 19:56:29,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-08-06 19:56:29,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 583. [2021-08-06 19:56:29,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 582 states have (on average 1.8127147766323024) internal successors, (1055), 582 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:29,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 1055 transitions. [2021-08-06 19:56:29,733 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 1055 transitions. Word has length 28 [2021-08-06 19:56:29,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:56:29,733 INFO L470 AbstractCegarLoop]: Abstraction has 583 states and 1055 transitions. [2021-08-06 19:56:29,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-08-06 19:56:29,734 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 1055 transitions. [2021-08-06 19:56:29,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 19:56:29,734 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:56:29,735 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:56:29,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2021-08-06 19:56:29,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:56:29,952 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:56:29,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:56:29,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1596643808, now seen corresponding path program 84 times [2021-08-06 19:56:29,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:56:29,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578803792] [2021-08-06 19:56:29,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:56:29,953 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:56:29,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:56:30,005 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 236, result has 9.9 percent of original size [2021-08-06 19:56:30,012 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 236, result has 9.9 percent of original size [2021-08-06 19:56:30,036 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 224, result has 6.3 percent of original size [2021-08-06 19:56:30,039 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 224, result has 6.3 percent of original size [2021-08-06 19:56:30,057 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 136, result has 9.9 percent of original size [2021-08-06 19:56:30,060 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 136, result has 9.9 percent of original size [2021-08-06 19:56:30,078 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 22.6 percent of original size [2021-08-06 19:56:30,079 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 22.6 percent of original size [2021-08-06 19:56:30,091 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 29.2 percent of original size [2021-08-06 19:56:30,092 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 29.2 percent of original size [2021-08-06 19:56:30,105 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 40.9 percent of original size [2021-08-06 19:56:30,106 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 40.9 percent of original size [2021-08-06 19:56:30,120 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 19:56:30,121 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 19:56:30,141 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:56:30,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:56:30,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578803792] [2021-08-06 19:56:30,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578803792] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:30,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101520172] [2021-08-06 19:56:30,142 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:56:30,142 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:56:30,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:56:30,145 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:56:30,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-08-06 19:56:33,662 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-06 19:56:33,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:56:33,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 19:56:33,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:56:34,430 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 63.6 percent of original size [2021-08-06 19:56:34,433 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 63.6 percent of original size [2021-08-06 19:56:34,522 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:56:34,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101520172] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:34,522 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:56:34,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 19:56:34,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819734516] [2021-08-06 19:56:34,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 19:56:34,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:56:34,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 19:56:34,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:56:34,523 INFO L87 Difference]: Start difference. First operand 583 states and 1055 transitions. Second operand has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:34,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:56:34,932 INFO L93 Difference]: Finished difference Result 738 states and 1289 transitions. [2021-08-06 19:56:34,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 19:56:34,933 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 19:56:34,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:56:34,934 INFO L225 Difference]: With dead ends: 738 [2021-08-06 19:56:34,934 INFO L226 Difference]: Without dead ends: 718 [2021-08-06 19:56:34,934 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 558.1ms TimeCoverageRelationStatistics Valid=281, Invalid=909, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 19:56:34,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2021-08-06 19:56:34,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 611. [2021-08-06 19:56:34,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 611 states, 610 states have (on average 1.8278688524590163) internal successors, (1115), 610 states have internal predecessors, (1115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:34,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 1115 transitions. [2021-08-06 19:56:34,940 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 1115 transitions. Word has length 30 [2021-08-06 19:56:34,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:56:34,940 INFO L470 AbstractCegarLoop]: Abstraction has 611 states and 1115 transitions. [2021-08-06 19:56:34,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:34,940 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 1115 transitions. [2021-08-06 19:56:34,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 19:56:34,941 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:56:34,941 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:56:34,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2021-08-06 19:56:35,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:56:35,142 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:56:35,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:56:35,142 INFO L82 PathProgramCache]: Analyzing trace with hash 761615324, now seen corresponding path program 85 times [2021-08-06 19:56:35,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:56:35,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322823120] [2021-08-06 19:56:35,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:56:35,142 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:56:35,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:56:35,193 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 70.4 percent of original size [2021-08-06 19:56:35,195 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 70.4 percent of original size [2021-08-06 19:56:35,232 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 114, result has 11.6 percent of original size [2021-08-06 19:56:35,235 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 114, result has 11.6 percent of original size [2021-08-06 19:56:35,252 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 75, result has 8.5 percent of original size [2021-08-06 19:56:35,253 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 75, result has 8.5 percent of original size [2021-08-06 19:56:35,263 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 75, result has 3.8 percent of original size [2021-08-06 19:56:35,264 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 75, result has 3.8 percent of original size [2021-08-06 19:56:35,272 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 163, result has 1.8 percent of original size [2021-08-06 19:56:35,274 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 163, result has 1.8 percent of original size [2021-08-06 19:56:35,282 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 19:56:35,283 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 19:56:35,303 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:56:35,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:56:35,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322823120] [2021-08-06 19:56:35,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322823120] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:35,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79340872] [2021-08-06 19:56:35,303 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:56:35,303 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:56:35,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:56:35,304 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:56:35,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-08-06 19:56:38,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:56:38,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 19:56:38,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:56:39,377 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 73.3 percent of original size [2021-08-06 19:56:39,381 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 73.3 percent of original size [2021-08-06 19:56:39,683 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:56:39,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79340872] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:39,683 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:56:39,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 19:56:39,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46424075] [2021-08-06 19:56:39,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 19:56:39,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:56:39,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 19:56:39,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:56:39,684 INFO L87 Difference]: Start difference. First operand 611 states and 1115 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:40,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:56:40,083 INFO L93 Difference]: Finished difference Result 765 states and 1353 transitions. [2021-08-06 19:56:40,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 19:56:40,083 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 19:56:40,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:56:40,084 INFO L225 Difference]: With dead ends: 765 [2021-08-06 19:56:40,084 INFO L226 Difference]: Without dead ends: 750 [2021-08-06 19:56:40,085 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 503.3ms TimeCoverageRelationStatistics Valid=224, Invalid=966, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 19:56:40,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2021-08-06 19:56:40,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 618. [2021-08-06 19:56:40,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 617 states have (on average 1.8330632090761751) internal successors, (1131), 617 states have internal predecessors, (1131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:40,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 1131 transitions. [2021-08-06 19:56:40,100 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 1131 transitions. Word has length 30 [2021-08-06 19:56:40,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:56:40,100 INFO L470 AbstractCegarLoop]: Abstraction has 618 states and 1131 transitions. [2021-08-06 19:56:40,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:40,100 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 1131 transitions. [2021-08-06 19:56:40,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 19:56:40,101 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:56:40,101 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:56:40,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2021-08-06 19:56:40,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:56:40,302 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:56:40,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:56:40,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1971477608, now seen corresponding path program 86 times [2021-08-06 19:56:40,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:56:40,302 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763112823] [2021-08-06 19:56:40,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:56:40,302 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:56:40,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:56:40,356 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 57.6 percent of original size [2021-08-06 19:56:40,359 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 57.6 percent of original size [2021-08-06 19:56:40,379 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 19:56:40,381 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 19:56:40,399 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 117, result has 11.4 percent of original size [2021-08-06 19:56:40,403 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 117, result has 11.4 percent of original size [2021-08-06 19:56:40,422 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 91, result has 28.9 percent of original size [2021-08-06 19:56:40,428 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 91, result has 28.9 percent of original size [2021-08-06 19:56:40,458 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 119, result has 32.0 percent of original size [2021-08-06 19:56:40,468 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 119, result has 32.0 percent of original size [2021-08-06 19:56:40,511 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 180, result has 10.0 percent of original size [2021-08-06 19:56:40,515 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 180, result has 10.0 percent of original size [2021-08-06 19:56:40,537 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 19:56:40,538 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 19:56:40,561 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:56:40,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:56:40,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763112823] [2021-08-06 19:56:40,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763112823] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:40,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143804089] [2021-08-06 19:56:40,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:56:40,561 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:56:40,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:56:40,562 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:56:40,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-08-06 19:56:44,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:56:44,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:56:44,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 19:56:44,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:56:44,608 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 73.3 percent of original size [2021-08-06 19:56:44,612 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 73.3 percent of original size [2021-08-06 19:56:45,202 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:56:45,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143804089] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:45,202 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:56:45,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 19:56:45,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855259045] [2021-08-06 19:56:45,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 19:56:45,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:56:45,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 19:56:45,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:56:45,203 INFO L87 Difference]: Start difference. First operand 618 states and 1131 transitions. Second operand has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:45,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:56:45,752 INFO L93 Difference]: Finished difference Result 814 states and 1421 transitions. [2021-08-06 19:56:45,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 19:56:45,752 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 19:56:45,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:56:45,754 INFO L225 Difference]: With dead ends: 814 [2021-08-06 19:56:45,754 INFO L226 Difference]: Without dead ends: 803 [2021-08-06 19:56:45,754 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 738.3ms TimeCoverageRelationStatistics Valid=259, Invalid=1073, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 19:56:45,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2021-08-06 19:56:45,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 635. [2021-08-06 19:56:45,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 634 states have (on average 1.8264984227129337) internal successors, (1158), 634 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:45,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 1158 transitions. [2021-08-06 19:56:45,762 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 1158 transitions. Word has length 30 [2021-08-06 19:56:45,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:56:45,762 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 1158 transitions. [2021-08-06 19:56:45,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:45,762 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 1158 transitions. [2021-08-06 19:56:45,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 19:56:45,763 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:56:45,763 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:56:45,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2021-08-06 19:56:45,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:56:45,978 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:56:45,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:56:45,978 INFO L82 PathProgramCache]: Analyzing trace with hash 620529568, now seen corresponding path program 87 times [2021-08-06 19:56:45,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:56:45,978 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323414531] [2021-08-06 19:56:45,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:56:45,979 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:56:45,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:56:46,030 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 55.6 percent of original size [2021-08-06 19:56:46,032 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 55.6 percent of original size [2021-08-06 19:56:46,047 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 19:56:46,048 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 19:56:46,057 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 219, result has 3.1 percent of original size [2021-08-06 19:56:46,059 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 219, result has 3.1 percent of original size [2021-08-06 19:56:46,070 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 177, result has 20.3 percent of original size [2021-08-06 19:56:46,077 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 177, result has 20.3 percent of original size [2021-08-06 19:56:46,105 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 242, result has 4.3 percent of original size [2021-08-06 19:56:46,109 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 242, result has 4.3 percent of original size [2021-08-06 19:56:46,125 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 239, result has 5.9 percent of original size [2021-08-06 19:56:46,128 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 239, result has 5.9 percent of original size [2021-08-06 19:56:46,143 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 19:56:46,144 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 19:56:46,163 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:56:46,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:56:46,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323414531] [2021-08-06 19:56:46,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323414531] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:46,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119895825] [2021-08-06 19:56:46,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:56:46,163 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:56:46,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:56:46,164 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:56:46,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-08-06 19:56:49,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 19:56:49,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:56:49,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 19:56:49,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:56:50,190 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 61.0 percent of original size [2021-08-06 19:56:50,192 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 61.0 percent of original size [2021-08-06 19:56:50,604 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:56:50,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119895825] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:50,604 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:56:50,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 19:56:50,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197664561] [2021-08-06 19:56:50,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 19:56:50,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:56:50,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 19:56:50,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:56:50,605 INFO L87 Difference]: Start difference. First operand 635 states and 1158 transitions. Second operand has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:51,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:56:51,253 INFO L93 Difference]: Finished difference Result 874 states and 1540 transitions. [2021-08-06 19:56:51,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 19:56:51,253 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 19:56:51,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:56:51,255 INFO L225 Difference]: With dead ends: 874 [2021-08-06 19:56:51,255 INFO L226 Difference]: Without dead ends: 859 [2021-08-06 19:56:51,255 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 741.1ms TimeCoverageRelationStatistics Valid=362, Invalid=1360, Unknown=0, NotChecked=0, Total=1722 [2021-08-06 19:56:51,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2021-08-06 19:56:51,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 663. [2021-08-06 19:56:51,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 662 states have (on average 1.8187311178247734) internal successors, (1204), 662 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:51,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 1204 transitions. [2021-08-06 19:56:51,264 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 1204 transitions. Word has length 30 [2021-08-06 19:56:51,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:56:51,265 INFO L470 AbstractCegarLoop]: Abstraction has 663 states and 1204 transitions. [2021-08-06 19:56:51,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:51,265 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 1204 transitions. [2021-08-06 19:56:51,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 19:56:51,266 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:56:51,266 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:56:51,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2021-08-06 19:56:51,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-08-06 19:56:51,482 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:56:51,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:56:51,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1680172056, now seen corresponding path program 88 times [2021-08-06 19:56:51,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:56:51,482 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961154527] [2021-08-06 19:56:51,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:56:51,483 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:56:51,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:56:51,554 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 469, result has 5.1 percent of original size [2021-08-06 19:56:51,561 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 469, result has 5.1 percent of original size [2021-08-06 19:56:51,581 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 458, result has 3.0 percent of original size [2021-08-06 19:56:51,583 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 458, result has 3.0 percent of original size [2021-08-06 19:56:51,598 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 458, result has 2.3 percent of original size [2021-08-06 19:56:51,599 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 458, result has 2.3 percent of original size [2021-08-06 19:56:51,612 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 348, result has 3.1 percent of original size [2021-08-06 19:56:51,615 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 348, result has 3.1 percent of original size [2021-08-06 19:56:51,631 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 598, result has 1.8 percent of original size [2021-08-06 19:56:51,638 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 598, result has 1.8 percent of original size [2021-08-06 19:56:51,653 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 544, result has 0.5 percent of original size [2021-08-06 19:56:51,656 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 544, result has 0.5 percent of original size [2021-08-06 19:56:51,664 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 19:56:51,665 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 19:56:51,685 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:56:51,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:56:51,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961154527] [2021-08-06 19:56:51,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961154527] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:51,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161152000] [2021-08-06 19:56:51,685 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:56:51,685 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:56:51,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:56:51,686 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:56:51,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-08-06 19:56:55,410 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:56:55,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:56:55,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 19:56:55,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:56:55,702 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 19:56:55,705 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 19:56:56,327 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:56:56,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161152000] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:56,327 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:56:56,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 19:56:56,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789703794] [2021-08-06 19:56:56,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 19:56:56,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:56:56,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 19:56:56,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:56:56,328 INFO L87 Difference]: Start difference. First operand 663 states and 1204 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:56,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:56:56,798 INFO L93 Difference]: Finished difference Result 922 states and 1621 transitions. [2021-08-06 19:56:56,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 19:56:56,798 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 19:56:56,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:56:56,799 INFO L225 Difference]: With dead ends: 922 [2021-08-06 19:56:56,799 INFO L226 Difference]: Without dead ends: 903 [2021-08-06 19:56:56,800 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 609.8ms TimeCoverageRelationStatistics Valid=266, Invalid=1066, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 19:56:56,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2021-08-06 19:56:56,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 675. [2021-08-06 19:56:56,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 674 states have (on average 1.8189910979228487) internal successors, (1226), 674 states have internal predecessors, (1226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:56,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 1226 transitions. [2021-08-06 19:56:56,811 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 1226 transitions. Word has length 30 [2021-08-06 19:56:56,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:56:56,811 INFO L470 AbstractCegarLoop]: Abstraction has 675 states and 1226 transitions. [2021-08-06 19:56:56,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:56,812 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 1226 transitions. [2021-08-06 19:56:56,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 19:56:56,812 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:56:56,812 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:56:56,841 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2021-08-06 19:56:57,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-08-06 19:56:57,021 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:56:57,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:56:57,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1867862356, now seen corresponding path program 89 times [2021-08-06 19:56:57,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:56:57,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442544631] [2021-08-06 19:56:57,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:56:57,022 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:56:57,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:56:57,143 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 60, result has 15.5 percent of original size [2021-08-06 19:56:57,145 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 60, result has 15.5 percent of original size [2021-08-06 19:56:57,159 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 160, result has 6.4 percent of original size [2021-08-06 19:56:57,168 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 160, result has 6.4 percent of original size [2021-08-06 19:56:57,217 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 249, result has 5.0 percent of original size [2021-08-06 19:56:57,220 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 249, result has 5.0 percent of original size [2021-08-06 19:56:57,235 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 19:56:57,236 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 19:56:57,256 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:56:57,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:56:57,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442544631] [2021-08-06 19:56:57,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442544631] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:57,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287311794] [2021-08-06 19:56:57,257 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:56:57,257 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:56:57,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:56:57,257 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:56:57,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-08-06 19:57:01,052 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 19:57:01,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:57:01,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 19:57:01,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:57:01,325 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 19:57:01,327 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 19:57:02,005 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:57:02,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287311794] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:57:02,005 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:57:02,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 19:57:02,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555595888] [2021-08-06 19:57:02,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 19:57:02,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:57:02,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 19:57:02,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:57:02,006 INFO L87 Difference]: Start difference. First operand 675 states and 1226 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:02,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:57:02,451 INFO L93 Difference]: Finished difference Result 1011 states and 1783 transitions. [2021-08-06 19:57:02,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 19:57:02,451 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 19:57:02,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:57:02,453 INFO L225 Difference]: With dead ends: 1011 [2021-08-06 19:57:02,453 INFO L226 Difference]: Without dead ends: 986 [2021-08-06 19:57:02,453 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 570.7ms TimeCoverageRelationStatistics Valid=247, Invalid=943, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 19:57:02,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2021-08-06 19:57:02,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 718. [2021-08-06 19:57:02,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 717 states have (on average 1.8158995815899581) internal successors, (1302), 717 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:02,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 1302 transitions. [2021-08-06 19:57:02,460 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 1302 transitions. Word has length 30 [2021-08-06 19:57:02,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:57:02,460 INFO L470 AbstractCegarLoop]: Abstraction has 718 states and 1302 transitions. [2021-08-06 19:57:02,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:02,460 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 1302 transitions. [2021-08-06 19:57:02,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 19:57:02,461 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:57:02,461 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:57:02,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2021-08-06 19:57:02,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:57:02,663 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:57:02,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:57:02,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1034672744, now seen corresponding path program 90 times [2021-08-06 19:57:02,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:57:02,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243459931] [2021-08-06 19:57:02,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:57:02,663 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:57:02,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:57:02,727 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 191, result has 11.6 percent of original size [2021-08-06 19:57:02,732 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 191, result has 11.6 percent of original size [2021-08-06 19:57:02,755 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 209, result has 6.3 percent of original size [2021-08-06 19:57:02,758 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 209, result has 6.3 percent of original size [2021-08-06 19:57:02,774 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 314, result has 4.3 percent of original size [2021-08-06 19:57:02,776 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 314, result has 4.3 percent of original size [2021-08-06 19:57:02,792 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 258, result has 11.0 percent of original size [2021-08-06 19:57:02,797 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 258, result has 11.0 percent of original size [2021-08-06 19:57:02,823 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 248, result has 6.8 percent of original size [2021-08-06 19:57:02,826 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 248, result has 6.8 percent of original size [2021-08-06 19:57:02,849 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 390, result has 3.2 percent of original size [2021-08-06 19:57:02,852 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 390, result has 3.2 percent of original size [2021-08-06 19:57:02,868 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 19:57:02,869 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 19:57:02,889 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:57:02,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:57:02,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243459931] [2021-08-06 19:57:02,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243459931] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:57:02,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859711735] [2021-08-06 19:57:02,889 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:57:02,889 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:57:02,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:57:02,890 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:57:02,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-08-06 19:57:06,765 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 19:57:06,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:57:06,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 19:57:06,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:57:07,031 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 19:57:07,034 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 19:57:07,880 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:57:07,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859711735] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:57:07,880 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:57:07,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 19:57:07,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899995075] [2021-08-06 19:57:07,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 19:57:07,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:57:07,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 19:57:07,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:57:07,881 INFO L87 Difference]: Start difference. First operand 718 states and 1302 transitions. Second operand has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:08,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:57:08,453 INFO L93 Difference]: Finished difference Result 984 states and 1715 transitions. [2021-08-06 19:57:08,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 19:57:08,454 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 19:57:08,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:57:08,456 INFO L225 Difference]: With dead ends: 984 [2021-08-06 19:57:08,456 INFO L226 Difference]: Without dead ends: 969 [2021-08-06 19:57:08,456 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 752.1ms TimeCoverageRelationStatistics Valid=257, Invalid=865, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 19:57:08,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 969 states. [2021-08-06 19:57:08,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 969 to 731. [2021-08-06 19:57:08,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 731 states, 730 states have (on average 1.8232876712328767) internal successors, (1331), 730 states have internal predecessors, (1331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:08,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 1331 transitions. [2021-08-06 19:57:08,468 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 1331 transitions. Word has length 30 [2021-08-06 19:57:08,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:57:08,468 INFO L470 AbstractCegarLoop]: Abstraction has 731 states and 1331 transitions. [2021-08-06 19:57:08,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:08,469 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 1331 transitions. [2021-08-06 19:57:08,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 19:57:08,470 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:57:08,470 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:57:08,511 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2021-08-06 19:57:08,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:57:08,685 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:57:08,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:57:08,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1323586388, now seen corresponding path program 91 times [2021-08-06 19:57:08,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:57:08,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139915373] [2021-08-06 19:57:08,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:57:08,685 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:57:08,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:57:08,749 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 80, result has 27.3 percent of original size [2021-08-06 19:57:08,753 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 80, result has 27.3 percent of original size [2021-08-06 19:57:08,777 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 88, result has 13.7 percent of original size [2021-08-06 19:57:08,780 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 88, result has 13.7 percent of original size [2021-08-06 19:57:08,797 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 92, result has 13.2 percent of original size [2021-08-06 19:57:08,799 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 92, result has 13.2 percent of original size [2021-08-06 19:57:08,816 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 76, result has 26.9 percent of original size [2021-08-06 19:57:08,820 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 76, result has 26.9 percent of original size [2021-08-06 19:57:08,851 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 86, result has 11.3 percent of original size [2021-08-06 19:57:08,854 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 86, result has 11.3 percent of original size [2021-08-06 19:57:08,870 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 30, result has 30.2 percent of original size [2021-08-06 19:57:08,872 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 30, result has 30.2 percent of original size [2021-08-06 19:57:08,889 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 19:57:08,890 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 19:57:08,911 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:57:08,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:57:08,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139915373] [2021-08-06 19:57:08,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139915373] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:57:08,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560188475] [2021-08-06 19:57:08,911 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:57:08,911 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:57:08,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:57:08,912 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:57:08,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-08-06 19:57:12,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:57:12,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 19:57:12,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:57:13,116 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 19:57:13,119 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 19:57:13,717 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:57:13,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560188475] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:57:13,717 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:57:13,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 19:57:13,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719011887] [2021-08-06 19:57:13,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 19:57:13,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:57:13,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 19:57:13,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:57:13,718 INFO L87 Difference]: Start difference. First operand 731 states and 1331 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:14,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:57:14,171 INFO L93 Difference]: Finished difference Result 908 states and 1612 transitions. [2021-08-06 19:57:14,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 19:57:14,172 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 19:57:14,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:57:14,173 INFO L225 Difference]: With dead ends: 908 [2021-08-06 19:57:14,173 INFO L226 Difference]: Without dead ends: 893 [2021-08-06 19:57:14,173 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 615.6ms TimeCoverageRelationStatistics Valid=251, Invalid=871, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 19:57:14,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2021-08-06 19:57:14,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 751. [2021-08-06 19:57:14,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 750 states have (on average 1.8186666666666667) internal successors, (1364), 750 states have internal predecessors, (1364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:14,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 1364 transitions. [2021-08-06 19:57:14,180 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 1364 transitions. Word has length 30 [2021-08-06 19:57:14,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:57:14,181 INFO L470 AbstractCegarLoop]: Abstraction has 751 states and 1364 transitions. [2021-08-06 19:57:14,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:14,181 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 1364 transitions. [2021-08-06 19:57:14,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 19:57:14,181 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:57:14,181 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:57:14,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2021-08-06 19:57:14,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-08-06 19:57:14,382 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:57:14,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:57:14,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1080937900, now seen corresponding path program 92 times [2021-08-06 19:57:14,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:57:14,382 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132319373] [2021-08-06 19:57:14,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:57:14,382 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:57:14,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:57:14,431 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 89.7 percent of original size [2021-08-06 19:57:14,434 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 89.7 percent of original size [2021-08-06 19:57:14,502 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 110, result has 9.1 percent of original size [2021-08-06 19:57:14,504 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 110, result has 9.1 percent of original size [2021-08-06 19:57:14,519 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 189, result has 5.5 percent of original size [2021-08-06 19:57:14,522 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 189, result has 5.5 percent of original size [2021-08-06 19:57:14,538 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 169, result has 7.1 percent of original size [2021-08-06 19:57:14,541 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 169, result has 7.1 percent of original size [2021-08-06 19:57:14,557 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 19:57:14,557 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 19:57:14,577 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:57:14,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:57:14,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132319373] [2021-08-06 19:57:14,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132319373] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:57:14,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23100140] [2021-08-06 19:57:14,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:57:14,578 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:57:14,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:57:14,578 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:57:14,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-08-06 19:57:18,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:57:18,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:57:18,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 19:57:18,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:57:18,759 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 19:57:18,762 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 19:57:19,544 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:57:19,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23100140] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:57:19,544 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:57:19,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 19:57:19,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37209991] [2021-08-06 19:57:19,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 19:57:19,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:57:19,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 19:57:19,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:57:19,545 INFO L87 Difference]: Start difference. First operand 751 states and 1364 transitions. Second operand has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:20,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:57:20,000 INFO L93 Difference]: Finished difference Result 1086 states and 1912 transitions. [2021-08-06 19:57:20,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 19:57:20,000 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 19:57:20,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:57:20,002 INFO L225 Difference]: With dead ends: 1086 [2021-08-06 19:57:20,002 INFO L226 Difference]: Without dead ends: 1061 [2021-08-06 19:57:20,002 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 571.6ms TimeCoverageRelationStatistics Valid=271, Invalid=989, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 19:57:20,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1061 states. [2021-08-06 19:57:20,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1061 to 773. [2021-08-06 19:57:20,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 772 states have (on average 1.8251295336787565) internal successors, (1409), 772 states have internal predecessors, (1409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:20,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 1409 transitions. [2021-08-06 19:57:20,010 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 1409 transitions. Word has length 30 [2021-08-06 19:57:20,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:57:20,010 INFO L470 AbstractCegarLoop]: Abstraction has 773 states and 1409 transitions. [2021-08-06 19:57:20,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:20,010 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 1409 transitions. [2021-08-06 19:57:20,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 19:57:20,011 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:57:20,011 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:57:20,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2021-08-06 19:57:20,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:57:20,211 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:57:20,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:57:20,212 INFO L82 PathProgramCache]: Analyzing trace with hash 311494296, now seen corresponding path program 93 times [2021-08-06 19:57:20,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:57:20,212 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966216421] [2021-08-06 19:57:20,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:57:20,212 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:57:20,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:57:20,258 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 54.5 percent of original size [2021-08-06 19:57:20,260 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 54.5 percent of original size [2021-08-06 19:57:20,322 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 44, result has 46.3 percent of original size [2021-08-06 19:57:20,326 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 44, result has 46.3 percent of original size [2021-08-06 19:57:20,363 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 88, result has 32.3 percent of original size [2021-08-06 19:57:20,368 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 88, result has 32.3 percent of original size [2021-08-06 19:57:20,389 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 78, result has 32.8 percent of original size [2021-08-06 19:57:20,393 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 78, result has 32.8 percent of original size [2021-08-06 19:57:20,416 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 19:57:20,417 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 19:57:20,436 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:57:20,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:57:20,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966216421] [2021-08-06 19:57:20,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966216421] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:57:20,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684949713] [2021-08-06 19:57:20,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:57:20,437 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:57:20,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:57:20,437 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:57:20,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-08-06 19:57:24,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 19:57:24,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:57:24,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 19:57:24,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:57:24,690 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 19:57:24,693 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 19:57:25,516 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:57:25,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684949713] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:57:25,517 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:57:25,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 19:57:25,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416659988] [2021-08-06 19:57:25,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 19:57:25,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:57:25,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 19:57:25,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:57:25,517 INFO L87 Difference]: Start difference. First operand 773 states and 1409 transitions. Second operand has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:25,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:57:25,947 INFO L93 Difference]: Finished difference Result 1067 states and 1862 transitions. [2021-08-06 19:57:25,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 19:57:25,947 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 19:57:25,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:57:25,948 INFO L225 Difference]: With dead ends: 1067 [2021-08-06 19:57:25,948 INFO L226 Difference]: Without dead ends: 1052 [2021-08-06 19:57:25,948 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 580.8ms TimeCoverageRelationStatistics Valid=243, Invalid=879, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 19:57:25,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2021-08-06 19:57:25,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 788. [2021-08-06 19:57:25,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 787 states have (on average 1.8335451080050826) internal successors, (1443), 787 states have internal predecessors, (1443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:25,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 1443 transitions. [2021-08-06 19:57:25,958 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 1443 transitions. Word has length 30 [2021-08-06 19:57:25,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:57:25,958 INFO L470 AbstractCegarLoop]: Abstraction has 788 states and 1443 transitions. [2021-08-06 19:57:25,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:25,959 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 1443 transitions. [2021-08-06 19:57:25,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 19:57:25,960 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:57:25,960 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:57:25,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2021-08-06 19:57:26,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-08-06 19:57:26,173 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:57:26,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:57:26,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1625213868, now seen corresponding path program 94 times [2021-08-06 19:57:26,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:57:26,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82267719] [2021-08-06 19:57:26,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:57:26,173 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:57:26,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:57:26,282 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 61.1 percent of original size [2021-08-06 19:57:26,283 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 61.1 percent of original size [2021-08-06 19:57:26,297 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 229, result has 4.6 percent of original size [2021-08-06 19:57:26,300 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 229, result has 4.6 percent of original size [2021-08-06 19:57:26,315 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 143, result has 8.3 percent of original size [2021-08-06 19:57:26,316 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 143, result has 8.3 percent of original size [2021-08-06 19:57:26,332 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 19:57:26,332 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 19:57:26,352 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:57:26,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:57:26,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82267719] [2021-08-06 19:57:26,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82267719] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:57:26,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79616225] [2021-08-06 19:57:26,355 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:57:26,355 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:57:26,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:57:26,380 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:57:26,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-08-06 19:57:30,478 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:57:30,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:57:30,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 19:57:30,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:57:30,673 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 19:57:30,677 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 19:57:31,390 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:57:31,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79616225] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:57:31,390 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:57:31,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 19:57:31,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735444737] [2021-08-06 19:57:31,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 19:57:31,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:57:31,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 19:57:31,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:57:31,391 INFO L87 Difference]: Start difference. First operand 788 states and 1443 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:31,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:57:31,871 INFO L93 Difference]: Finished difference Result 1174 states and 2058 transitions. [2021-08-06 19:57:31,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 19:57:31,871 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 19:57:31,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:57:31,873 INFO L225 Difference]: With dead ends: 1174 [2021-08-06 19:57:31,873 INFO L226 Difference]: Without dead ends: 1146 [2021-08-06 19:57:31,873 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 593.1ms TimeCoverageRelationStatistics Valid=307, Invalid=1025, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 19:57:31,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1146 states. [2021-08-06 19:57:31,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1146 to 838. [2021-08-06 19:57:31,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 838 states, 837 states have (on average 1.8351254480286738) internal successors, (1536), 837 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:31,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 1536 transitions. [2021-08-06 19:57:31,881 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 1536 transitions. Word has length 30 [2021-08-06 19:57:31,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:57:31,881 INFO L470 AbstractCegarLoop]: Abstraction has 838 states and 1536 transitions. [2021-08-06 19:57:31,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:31,881 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 1536 transitions. [2021-08-06 19:57:31,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 19:57:31,882 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:57:31,882 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:57:31,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2021-08-06 19:57:32,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-08-06 19:57:32,083 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:57:32,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:57:32,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1609209832, now seen corresponding path program 95 times [2021-08-06 19:57:32,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:57:32,083 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850297514] [2021-08-06 19:57:32,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:57:32,083 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:57:32,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:57:32,134 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 116, result has 10.8 percent of original size [2021-08-06 19:57:32,137 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 116, result has 10.8 percent of original size [2021-08-06 19:57:32,152 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 116, result has 10.8 percent of original size [2021-08-06 19:57:32,155 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 116, result has 10.8 percent of original size [2021-08-06 19:57:32,170 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 97, result has 26.5 percent of original size [2021-08-06 19:57:32,175 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 97, result has 26.5 percent of original size [2021-08-06 19:57:32,207 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 70, result has 13.6 percent of original size [2021-08-06 19:57:32,208 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 70, result has 13.6 percent of original size [2021-08-06 19:57:32,222 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 121, result has 8.3 percent of original size [2021-08-06 19:57:32,224 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 121, result has 8.3 percent of original size [2021-08-06 19:57:32,239 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 109, result has 2.7 percent of original size [2021-08-06 19:57:32,240 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 109, result has 2.7 percent of original size [2021-08-06 19:57:32,248 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 19:57:32,249 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 19:57:32,268 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:57:32,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:57:32,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850297514] [2021-08-06 19:57:32,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850297514] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:57:32,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168347581] [2021-08-06 19:57:32,269 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:57:32,269 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:57:32,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:57:32,269 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:57:32,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-08-06 19:57:36,461 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 19:57:36,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:57:36,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 19:57:36,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:57:36,654 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 19:57:36,656 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 19:57:37,467 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:57:37,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168347581] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:57:37,468 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:57:37,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 19:57:37,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735071621] [2021-08-06 19:57:37,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 19:57:37,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:57:37,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 19:57:37,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:57:37,468 INFO L87 Difference]: Start difference. First operand 838 states and 1536 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:38,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:57:38,100 INFO L93 Difference]: Finished difference Result 1077 states and 1919 transitions. [2021-08-06 19:57:38,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 19:57:38,100 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 19:57:38,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:57:38,101 INFO L225 Difference]: With dead ends: 1077 [2021-08-06 19:57:38,101 INFO L226 Difference]: Without dead ends: 1062 [2021-08-06 19:57:38,101 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 756.7ms TimeCoverageRelationStatistics Valid=292, Invalid=1114, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 19:57:38,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1062 states. [2021-08-06 19:57:38,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1062 to 851. [2021-08-06 19:57:38,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 850 states have (on average 1.8352941176470587) internal successors, (1560), 850 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:38,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 1560 transitions. [2021-08-06 19:57:38,109 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 1560 transitions. Word has length 30 [2021-08-06 19:57:38,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:57:38,109 INFO L470 AbstractCegarLoop]: Abstraction has 851 states and 1560 transitions. [2021-08-06 19:57:38,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:38,109 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 1560 transitions. [2021-08-06 19:57:38,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 19:57:38,110 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:57:38,110 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:57:38,137 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2021-08-06 19:57:38,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-08-06 19:57:38,310 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:57:38,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:57:38,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1230051028, now seen corresponding path program 96 times [2021-08-06 19:57:38,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:57:38,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239013454] [2021-08-06 19:57:38,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:57:38,311 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:57:38,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:57:38,359 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 116, result has 10.8 percent of original size [2021-08-06 19:57:38,362 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 116, result has 10.8 percent of original size [2021-08-06 19:57:38,377 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 116, result has 10.8 percent of original size [2021-08-06 19:57:38,379 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 116, result has 10.8 percent of original size [2021-08-06 19:57:38,395 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 97, result has 26.5 percent of original size [2021-08-06 19:57:38,399 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 97, result has 26.5 percent of original size [2021-08-06 19:57:38,431 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 108, result has 9.2 percent of original size [2021-08-06 19:57:38,432 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 108, result has 9.2 percent of original size [2021-08-06 19:57:38,445 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 64, result has 4.5 percent of original size [2021-08-06 19:57:38,446 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 64, result has 4.5 percent of original size [2021-08-06 19:57:38,454 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 109, result has 2.7 percent of original size [2021-08-06 19:57:38,455 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 109, result has 2.7 percent of original size [2021-08-06 19:57:38,464 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 19:57:38,465 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 19:57:38,485 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:57:38,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:57:38,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239013454] [2021-08-06 19:57:38,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239013454] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:57:38,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249546596] [2021-08-06 19:57:38,485 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:57:38,485 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:57:38,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:57:38,486 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:57:38,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-08-06 19:57:42,747 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-06 19:57:42,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:57:42,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 19:57:42,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:57:42,940 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 19:57:42,943 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 19:57:43,933 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:57:43,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249546596] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:57:43,933 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:57:43,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 19:57:43,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134957564] [2021-08-06 19:57:43,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 19:57:43,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:57:43,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 19:57:43,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:57:43,934 INFO L87 Difference]: Start difference. First operand 851 states and 1560 transitions. Second operand has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:44,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:57:44,609 INFO L93 Difference]: Finished difference Result 1095 states and 1947 transitions. [2021-08-06 19:57:44,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 19:57:44,610 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 19:57:44,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:57:44,611 INFO L225 Difference]: With dead ends: 1095 [2021-08-06 19:57:44,611 INFO L226 Difference]: Without dead ends: 1080 [2021-08-06 19:57:44,611 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 855.4ms TimeCoverageRelationStatistics Valid=250, Invalid=1082, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 19:57:44,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1080 states. [2021-08-06 19:57:44,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1080 to 883. [2021-08-06 19:57:44,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 883 states, 882 states have (on average 1.8333333333333333) internal successors, (1617), 882 states have internal predecessors, (1617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:44,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1617 transitions. [2021-08-06 19:57:44,622 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1617 transitions. Word has length 30 [2021-08-06 19:57:44,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:57:44,622 INFO L470 AbstractCegarLoop]: Abstraction has 883 states and 1617 transitions. [2021-08-06 19:57:44,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:44,622 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1617 transitions. [2021-08-06 19:57:44,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 19:57:44,623 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:57:44,623 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:57:44,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2021-08-06 19:57:44,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:57:44,849 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:57:44,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:57:44,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1192863640, now seen corresponding path program 97 times [2021-08-06 19:57:44,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:57:44,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417012016] [2021-08-06 19:57:44,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:57:44,849 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:57:44,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:57:44,944 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 108, result has 9.2 percent of original size [2021-08-06 19:57:44,945 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 108, result has 9.2 percent of original size [2021-08-06 19:57:44,960 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 184, result has 5.6 percent of original size [2021-08-06 19:57:44,963 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 184, result has 5.6 percent of original size [2021-08-06 19:57:44,979 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 223, result has 5.5 percent of original size [2021-08-06 19:57:44,982 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 223, result has 5.5 percent of original size [2021-08-06 19:57:44,998 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 19:57:44,998 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 19:57:45,019 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:57:45,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:57:45,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417012016] [2021-08-06 19:57:45,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417012016] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:57:45,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345921035] [2021-08-06 19:57:45,019 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:57:45,019 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:57:45,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:57:45,020 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:57:45,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2021-08-06 19:57:49,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:57:49,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 19:57:49,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:57:49,487 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:57:49,489 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:57:50,453 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:57:50,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345921035] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:57:50,454 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:57:50,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 19:57:50,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414696324] [2021-08-06 19:57:50,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 19:57:50,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:57:50,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 19:57:50,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:57:50,454 INFO L87 Difference]: Start difference. First operand 883 states and 1617 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:50,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:57:50,927 INFO L93 Difference]: Finished difference Result 1206 states and 2123 transitions. [2021-08-06 19:57:50,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 19:57:50,928 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 19:57:50,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:57:50,929 INFO L225 Difference]: With dead ends: 1206 [2021-08-06 19:57:50,929 INFO L226 Difference]: Without dead ends: 1191 [2021-08-06 19:57:50,929 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 640.1ms TimeCoverageRelationStatistics Valid=280, Invalid=1052, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 19:57:50,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1191 states. [2021-08-06 19:57:50,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1191 to 918. [2021-08-06 19:57:50,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 918 states, 917 states have (on average 1.8331515812431842) internal successors, (1681), 917 states have internal predecessors, (1681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:50,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 918 states to 918 states and 1681 transitions. [2021-08-06 19:57:50,937 INFO L78 Accepts]: Start accepts. Automaton has 918 states and 1681 transitions. Word has length 30 [2021-08-06 19:57:50,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:57:50,938 INFO L470 AbstractCegarLoop]: Abstraction has 918 states and 1681 transitions. [2021-08-06 19:57:50,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:50,938 INFO L276 IsEmpty]: Start isEmpty. Operand 918 states and 1681 transitions. [2021-08-06 19:57:50,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 19:57:50,938 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:57:50,939 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:57:50,965 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2021-08-06 19:57:51,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:57:51,139 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:57:51,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:57:51,139 INFO L82 PathProgramCache]: Analyzing trace with hash -537906092, now seen corresponding path program 98 times [2021-08-06 19:57:51,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:57:51,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751685798] [2021-08-06 19:57:51,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:57:51,140 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:57:51,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:57:51,260 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 78, result has 33.3 percent of original size [2021-08-06 19:57:51,265 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 78, result has 33.3 percent of original size [2021-08-06 19:57:51,297 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 63, result has 14.9 percent of original size [2021-08-06 19:57:51,299 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 63, result has 14.9 percent of original size [2021-08-06 19:57:51,316 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 40, result has 24.5 percent of original size [2021-08-06 19:57:51,318 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 40, result has 24.5 percent of original size [2021-08-06 19:57:51,335 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 19:57:51,336 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 19:57:51,358 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:57:51,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:57:51,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751685798] [2021-08-06 19:57:51,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751685798] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:57:51,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82409345] [2021-08-06 19:57:51,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:57:51,358 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:57:51,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:57:51,369 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:57:51,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-08-06 19:57:55,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:57:55,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:57:55,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 19:57:55,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:57:55,913 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:57:55,915 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:57:56,826 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:57:56,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82409345] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:57:56,826 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:57:56,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 19:57:56,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617794174] [2021-08-06 19:57:56,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 19:57:56,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:57:56,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 19:57:56,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:57:56,827 INFO L87 Difference]: Start difference. First operand 918 states and 1681 transitions. Second operand has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:57,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:57:57,315 INFO L93 Difference]: Finished difference Result 1272 states and 2239 transitions. [2021-08-06 19:57:57,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 19:57:57,316 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 19:57:57,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:57:57,317 INFO L225 Difference]: With dead ends: 1272 [2021-08-06 19:57:57,317 INFO L226 Difference]: Without dead ends: 1257 [2021-08-06 19:57:57,317 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 651.8ms TimeCoverageRelationStatistics Valid=266, Invalid=994, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 19:57:57,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1257 states. [2021-08-06 19:57:57,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1257 to 934. [2021-08-06 19:57:57,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 933 states have (on average 1.8295819935691318) internal successors, (1707), 933 states have internal predecessors, (1707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:57,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 1707 transitions. [2021-08-06 19:57:57,326 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 1707 transitions. Word has length 30 [2021-08-06 19:57:57,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:57:57,326 INFO L470 AbstractCegarLoop]: Abstraction has 934 states and 1707 transitions. [2021-08-06 19:57:57,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:57,326 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 1707 transitions. [2021-08-06 19:57:57,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 19:57:57,327 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:57:57,327 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:57:57,367 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2021-08-06 19:57:57,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-08-06 19:57:57,528 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:57:57,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:57:57,528 INFO L82 PathProgramCache]: Analyzing trace with hash -727840488, now seen corresponding path program 99 times [2021-08-06 19:57:57,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:57:57,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825075419] [2021-08-06 19:57:57,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:57:57,528 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:57:57,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:57:57,614 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 77.8 percent of original size [2021-08-06 19:57:57,616 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 77.8 percent of original size [2021-08-06 19:57:57,633 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 76.5 percent of original size [2021-08-06 19:57:57,636 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 76.5 percent of original size [2021-08-06 19:57:57,668 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 408, result has 4.9 percent of original size [2021-08-06 19:57:57,673 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 408, result has 4.9 percent of original size [2021-08-06 19:57:57,697 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 221, result has 4.7 percent of original size [2021-08-06 19:57:57,699 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 221, result has 4.7 percent of original size [2021-08-06 19:57:57,717 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 225, result has 1.3 percent of original size [2021-08-06 19:57:57,719 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 225, result has 1.3 percent of original size [2021-08-06 19:57:57,732 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 19:57:57,733 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 19:57:57,755 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:57:57,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:57:57,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825075419] [2021-08-06 19:57:57,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825075419] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:57:57,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899592926] [2021-08-06 19:57:57,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:57:57,755 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:57:57,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:57:57,761 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:57:57,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-08-06 19:58:02,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 19:58:02,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:58:02,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 19:58:02,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:58:02,388 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:58:02,390 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:58:03,265 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:58:03,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899592926] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:58:03,265 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:58:03,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 19:58:03,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809100338] [2021-08-06 19:58:03,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 19:58:03,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:58:03,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 19:58:03,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:58:03,266 INFO L87 Difference]: Start difference. First operand 934 states and 1707 transitions. Second operand has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:58:03,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:58:03,968 INFO L93 Difference]: Finished difference Result 1218 states and 2151 transitions. [2021-08-06 19:58:03,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 19:58:03,968 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 19:58:03,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:58:03,969 INFO L225 Difference]: With dead ends: 1218 [2021-08-06 19:58:03,969 INFO L226 Difference]: Without dead ends: 1203 [2021-08-06 19:58:03,969 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 870.7ms TimeCoverageRelationStatistics Valid=297, Invalid=1185, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 19:58:03,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1203 states. [2021-08-06 19:58:03,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1203 to 939. [2021-08-06 19:58:03,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 939 states, 938 states have (on average 1.8315565031982943) internal successors, (1718), 938 states have internal predecessors, (1718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:58:03,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 939 states to 939 states and 1718 transitions. [2021-08-06 19:58:03,981 INFO L78 Accepts]: Start accepts. Automaton has 939 states and 1718 transitions. Word has length 30 [2021-08-06 19:58:03,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:58:03,981 INFO L470 AbstractCegarLoop]: Abstraction has 939 states and 1718 transitions. [2021-08-06 19:58:03,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:58:03,981 INFO L276 IsEmpty]: Start isEmpty. Operand 939 states and 1718 transitions. [2021-08-06 19:58:03,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 19:58:03,982 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:58:03,982 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:58:04,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2021-08-06 19:58:04,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:58:04,209 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:58:04,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:58:04,209 INFO L82 PathProgramCache]: Analyzing trace with hash 2093172240, now seen corresponding path program 100 times [2021-08-06 19:58:04,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:58:04,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825349118] [2021-08-06 19:58:04,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:58:04,209 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:58:04,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:58:04,272 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 128, result has 9.9 percent of original size [2021-08-06 19:58:04,275 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 128, result has 9.9 percent of original size [2021-08-06 19:58:04,291 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 155, result has 15.8 percent of original size [2021-08-06 19:58:04,295 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 155, result has 15.8 percent of original size [2021-08-06 19:58:04,326 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 166, result has 13.5 percent of original size [2021-08-06 19:58:04,331 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 166, result has 13.5 percent of original size [2021-08-06 19:58:04,360 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 92, result has 29.2 percent of original size [2021-08-06 19:58:04,365 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 92, result has 29.2 percent of original size [2021-08-06 19:58:04,400 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 95, result has 10.4 percent of original size [2021-08-06 19:58:04,402 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 95, result has 10.4 percent of original size [2021-08-06 19:58:04,417 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:58:04,417 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 19:58:04,436 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:58:04,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:58:04,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825349118] [2021-08-06 19:58:04,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825349118] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:58:04,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199164432] [2021-08-06 19:58:04,436 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:58:04,437 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:58:04,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:58:04,448 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:58:04,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2021-08-06 19:58:08,960 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:58:08,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:58:08,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 19:58:08,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:58:09,074 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:58:09,076 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:58:10,137 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:58:10,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199164432] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:58:10,137 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:58:10,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 19:58:10,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195379810] [2021-08-06 19:58:10,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 19:58:10,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:58:10,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 19:58:10,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:58:10,138 INFO L87 Difference]: Start difference. First operand 939 states and 1718 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:58:10,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:58:10,724 INFO L93 Difference]: Finished difference Result 1092 states and 1960 transitions. [2021-08-06 19:58:10,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 19:58:10,724 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 19:58:10,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:58:10,725 INFO L225 Difference]: With dead ends: 1092 [2021-08-06 19:58:10,725 INFO L226 Difference]: Without dead ends: 1081 [2021-08-06 19:58:10,726 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 816.4ms TimeCoverageRelationStatistics Valid=168, Invalid=1092, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 19:58:10,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1081 states. [2021-08-06 19:58:10,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1081 to 961. [2021-08-06 19:58:10,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 961 states, 960 states have (on average 1.8270833333333334) internal successors, (1754), 960 states have internal predecessors, (1754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:58:10,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 961 states to 961 states and 1754 transitions. [2021-08-06 19:58:10,734 INFO L78 Accepts]: Start accepts. Automaton has 961 states and 1754 transitions. Word has length 30 [2021-08-06 19:58:10,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:58:10,734 INFO L470 AbstractCegarLoop]: Abstraction has 961 states and 1754 transitions. [2021-08-06 19:58:10,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:58:10,734 INFO L276 IsEmpty]: Start isEmpty. Operand 961 states and 1754 transitions. [2021-08-06 19:58:10,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 19:58:10,735 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:58:10,735 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:58:10,778 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2021-08-06 19:58:10,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:58:10,935 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:58:10,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:58:10,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1877464916, now seen corresponding path program 101 times [2021-08-06 19:58:10,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:58:10,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482856931] [2021-08-06 19:58:10,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:58:10,936 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:58:10,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:58:10,994 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 19:58:10,995 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 19:58:11,004 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 65.2 percent of original size [2021-08-06 19:58:11,005 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 65.2 percent of original size [2021-08-06 19:58:11,021 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 61.1 percent of original size [2021-08-06 19:58:11,022 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 61.1 percent of original size [2021-08-06 19:58:11,037 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 304, result has 3.5 percent of original size [2021-08-06 19:58:11,039 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 304, result has 3.5 percent of original size [2021-08-06 19:58:11,055 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 272, result has 4.6 percent of original size [2021-08-06 19:58:11,059 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 272, result has 4.6 percent of original size [2021-08-06 19:58:11,074 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 19:58:11,075 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 19:58:11,094 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:58:11,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:58:11,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482856931] [2021-08-06 19:58:11,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482856931] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:58:11,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486668298] [2021-08-06 19:58:11,095 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:58:11,095 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:58:11,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:58:11,096 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:58:11,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2021-08-06 19:58:15,675 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 19:58:15,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:58:15,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 19:58:15,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:58:15,786 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:58:15,788 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:58:16,659 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:58:16,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486668298] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:58:16,659 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:58:16,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 19:58:16,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933987389] [2021-08-06 19:58:16,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 19:58:16,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:58:16,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 19:58:16,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:58:16,660 INFO L87 Difference]: Start difference. First operand 961 states and 1754 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:58:17,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:58:17,433 INFO L93 Difference]: Finished difference Result 1386 states and 2419 transitions. [2021-08-06 19:58:17,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 19:58:17,434 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 19:58:17,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:58:17,435 INFO L225 Difference]: With dead ends: 1386 [2021-08-06 19:58:17,435 INFO L226 Difference]: Without dead ends: 1358 [2021-08-06 19:58:17,435 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 888.0ms TimeCoverageRelationStatistics Valid=429, Invalid=1377, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 19:58:17,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1358 states. [2021-08-06 19:58:17,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1358 to 985. [2021-08-06 19:58:17,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 984 states have (on average 1.8272357723577235) internal successors, (1798), 984 states have internal predecessors, (1798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:58:17,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 1798 transitions. [2021-08-06 19:58:17,445 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 1798 transitions. Word has length 30 [2021-08-06 19:58:17,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:58:17,445 INFO L470 AbstractCegarLoop]: Abstraction has 985 states and 1798 transitions. [2021-08-06 19:58:17,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:58:17,445 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 1798 transitions. [2021-08-06 19:58:17,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 19:58:17,446 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:58:17,446 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:58:17,475 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2021-08-06 19:58:17,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:58:17,650 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:58:17,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:58:17,650 INFO L82 PathProgramCache]: Analyzing trace with hash -837379884, now seen corresponding path program 102 times [2021-08-06 19:58:17,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:58:17,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761699612] [2021-08-06 19:58:17,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:58:17,651 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:58:17,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:58:17,716 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 96, result has 12.7 percent of original size [2021-08-06 19:58:17,718 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 96, result has 12.7 percent of original size [2021-08-06 19:58:17,734 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 85, result has 24.1 percent of original size [2021-08-06 19:58:17,737 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 85, result has 24.1 percent of original size [2021-08-06 19:58:17,765 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 70, result has 13.6 percent of original size [2021-08-06 19:58:17,767 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 70, result has 13.6 percent of original size [2021-08-06 19:58:17,780 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 64, result has 4.5 percent of original size [2021-08-06 19:58:17,781 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 64, result has 4.5 percent of original size [2021-08-06 19:58:17,789 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 109, result has 2.7 percent of original size [2021-08-06 19:58:17,790 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 109, result has 2.7 percent of original size [2021-08-06 19:58:17,798 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 19:58:17,799 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 19:58:17,819 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:58:17,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:58:17,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761699612] [2021-08-06 19:58:17,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761699612] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:58:17,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846362585] [2021-08-06 19:58:17,819 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:58:17,819 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:58:17,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:58:17,820 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:58:17,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2021-08-06 19:58:22,492 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 19:58:22,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:58:22,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 19:58:22,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:58:22,604 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:58:22,606 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:58:23,547 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:58:23,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846362585] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:58:23,547 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:58:23,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 19:58:23,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977045367] [2021-08-06 19:58:23,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 19:58:23,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:58:23,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 19:58:23,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:58:23,548 INFO L87 Difference]: Start difference. First operand 985 states and 1798 transitions. Second operand has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:58:24,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:58:24,086 INFO L93 Difference]: Finished difference Result 1195 states and 2120 transitions. [2021-08-06 19:58:24,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 19:58:24,086 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 19:58:24,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:58:24,087 INFO L225 Difference]: With dead ends: 1195 [2021-08-06 19:58:24,087 INFO L226 Difference]: Without dead ends: 1180 [2021-08-06 19:58:24,087 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 661.7ms TimeCoverageRelationStatistics Valid=246, Invalid=1086, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 19:58:24,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2021-08-06 19:58:24,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 985. [2021-08-06 19:58:24,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 984 states have (on average 1.8272357723577235) internal successors, (1798), 984 states have internal predecessors, (1798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:58:24,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 1798 transitions. [2021-08-06 19:58:24,096 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 1798 transitions. Word has length 30 [2021-08-06 19:58:24,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:58:24,096 INFO L470 AbstractCegarLoop]: Abstraction has 985 states and 1798 transitions. [2021-08-06 19:58:24,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:58:24,096 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 1798 transitions. [2021-08-06 19:58:24,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 19:58:24,097 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:58:24,097 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:58:24,125 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2021-08-06 19:58:24,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-08-06 19:58:24,297 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:58:24,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:58:24,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1180297616, now seen corresponding path program 103 times [2021-08-06 19:58:24,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:58:24,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596397286] [2021-08-06 19:58:24,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:58:24,298 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:58:24,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:58:24,385 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 45, result has 19.6 percent of original size [2021-08-06 19:58:24,386 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 45, result has 19.6 percent of original size [2021-08-06 19:58:24,400 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 83, result has 11.7 percent of original size [2021-08-06 19:58:24,402 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 83, result has 11.7 percent of original size [2021-08-06 19:58:24,417 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 145, result has 2.0 percent of original size [2021-08-06 19:58:24,418 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 145, result has 2.0 percent of original size [2021-08-06 19:58:24,427 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 19:58:24,428 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 19:58:24,447 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:58:24,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:58:24,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596397286] [2021-08-06 19:58:24,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596397286] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:58:24,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542426315] [2021-08-06 19:58:24,447 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:58:24,447 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:58:24,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:58:24,448 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:58:24,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2021-08-06 19:58:29,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:58:29,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 19:58:29,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:58:29,302 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:58:29,304 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:58:30,054 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:58:30,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542426315] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:58:30,054 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:58:30,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 19:58:30,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503319606] [2021-08-06 19:58:30,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 19:58:30,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:58:30,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 19:58:30,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:58:30,055 INFO L87 Difference]: Start difference. First operand 985 states and 1798 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:58:30,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:58:30,521 INFO L93 Difference]: Finished difference Result 1135 states and 2033 transitions. [2021-08-06 19:58:30,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 19:58:30,522 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 19:58:30,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:58:30,523 INFO L225 Difference]: With dead ends: 1135 [2021-08-06 19:58:30,523 INFO L226 Difference]: Without dead ends: 1112 [2021-08-06 19:58:30,523 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 606.7ms TimeCoverageRelationStatistics Valid=293, Invalid=1039, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 19:58:30,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1112 states. [2021-08-06 19:58:30,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1112 to 990. [2021-08-06 19:58:30,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 990 states, 989 states have (on average 1.8240647118301314) internal successors, (1804), 989 states have internal predecessors, (1804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:58:30,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 990 states to 990 states and 1804 transitions. [2021-08-06 19:58:30,531 INFO L78 Accepts]: Start accepts. Automaton has 990 states and 1804 transitions. Word has length 30 [2021-08-06 19:58:30,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:58:30,531 INFO L470 AbstractCegarLoop]: Abstraction has 990 states and 1804 transitions. [2021-08-06 19:58:30,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:58:30,531 INFO L276 IsEmpty]: Start isEmpty. Operand 990 states and 1804 transitions. [2021-08-06 19:58:30,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 19:58:30,532 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:58:30,532 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:58:30,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2021-08-06 19:58:30,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-08-06 19:58:30,733 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:58:30,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:58:30,733 INFO L82 PathProgramCache]: Analyzing trace with hash -759014948, now seen corresponding path program 104 times [2021-08-06 19:58:30,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:58:30,733 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576166019] [2021-08-06 19:58:30,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:58:30,733 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:58:30,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:58:30,860 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 70.7 percent of original size [2021-08-06 19:58:30,863 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 70.7 percent of original size [2021-08-06 19:58:30,909 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 134, result has 10.1 percent of original size [2021-08-06 19:58:30,912 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 134, result has 10.1 percent of original size [2021-08-06 19:58:30,927 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 122, result has 21.3 percent of original size [2021-08-06 19:58:30,932 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 122, result has 21.3 percent of original size [2021-08-06 19:58:30,956 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 19:58:30,956 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 19:58:30,976 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:58:30,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:58:30,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576166019] [2021-08-06 19:58:30,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576166019] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:58:30,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583053293] [2021-08-06 19:58:30,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:58:30,976 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:58:30,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:58:30,977 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:58:30,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2021-08-06 19:58:35,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:58:35,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:58:35,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 19:58:35,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:58:35,837 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:58:35,838 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:58:36,493 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:58:36,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583053293] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:58:36,493 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:58:36,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 19:58:36,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584713233] [2021-08-06 19:58:36,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 19:58:36,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:58:36,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 19:58:36,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:58:36,494 INFO L87 Difference]: Start difference. First operand 990 states and 1804 transitions. Second operand has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:58:36,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:58:36,952 INFO L93 Difference]: Finished difference Result 1166 states and 2075 transitions. [2021-08-06 19:58:36,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 19:58:36,952 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 19:58:36,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:58:36,953 INFO L225 Difference]: With dead ends: 1166 [2021-08-06 19:58:36,953 INFO L226 Difference]: Without dead ends: 1151 [2021-08-06 19:58:36,954 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 559.9ms TimeCoverageRelationStatistics Valid=308, Invalid=1024, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 19:58:36,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1151 states. [2021-08-06 19:58:36,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1151 to 1008. [2021-08-06 19:58:36,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1008 states, 1007 states have (on average 1.8232373386295928) internal successors, (1836), 1007 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:58:36,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1008 states to 1008 states and 1836 transitions. [2021-08-06 19:58:36,962 INFO L78 Accepts]: Start accepts. Automaton has 1008 states and 1836 transitions. Word has length 30 [2021-08-06 19:58:36,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:58:36,962 INFO L470 AbstractCegarLoop]: Abstraction has 1008 states and 1836 transitions. [2021-08-06 19:58:36,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:58:36,962 INFO L276 IsEmpty]: Start isEmpty. Operand 1008 states and 1836 transitions. [2021-08-06 19:58:36,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 19:58:36,963 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:58:36,963 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:58:36,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2021-08-06 19:58:37,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-08-06 19:58:37,165 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:58:37,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:58:37,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1876383848, now seen corresponding path program 105 times [2021-08-06 19:58:37,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:58:37,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370445203] [2021-08-06 19:58:37,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:58:37,166 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:58:37,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:58:37,286 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 64, result has 39.0 percent of original size [2021-08-06 19:58:37,290 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 64, result has 39.0 percent of original size [2021-08-06 19:58:37,318 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 135, result has 24.6 percent of original size [2021-08-06 19:58:37,324 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 135, result has 24.6 percent of original size [2021-08-06 19:58:37,354 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 39, result has 7.1 percent of original size [2021-08-06 19:58:37,355 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 39, result has 7.1 percent of original size [2021-08-06 19:58:37,363 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 19:58:37,364 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 19:58:37,383 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:58:37,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:58:37,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370445203] [2021-08-06 19:58:37,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370445203] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:58:37,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389121718] [2021-08-06 19:58:37,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:58:37,384 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:58:37,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:58:37,385 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:58:37,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2021-08-06 19:58:42,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-06 19:58:42,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:58:42,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 19:58:42,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:58:42,334 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:58:42,336 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:58:43,208 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:58:43,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389121718] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:58:43,208 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:58:43,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 19:58:43,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440185350] [2021-08-06 19:58:43,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 19:58:43,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:58:43,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 19:58:43,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:58:43,209 INFO L87 Difference]: Start difference. First operand 1008 states and 1836 transitions. Second operand has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:58:43,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:58:43,666 INFO L93 Difference]: Finished difference Result 1260 states and 2245 transitions. [2021-08-06 19:58:43,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 19:58:43,666 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 19:58:43,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:58:43,668 INFO L225 Difference]: With dead ends: 1260 [2021-08-06 19:58:43,668 INFO L226 Difference]: Without dead ends: 1241 [2021-08-06 19:58:43,668 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 598.7ms TimeCoverageRelationStatistics Valid=267, Invalid=993, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 19:58:43,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1241 states. [2021-08-06 19:58:43,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1241 to 1036. [2021-08-06 19:58:43,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1036 states, 1035 states have (on average 1.8202898550724638) internal successors, (1884), 1035 states have internal predecessors, (1884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:58:43,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 1884 transitions. [2021-08-06 19:58:43,677 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 1884 transitions. Word has length 30 [2021-08-06 19:58:43,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:58:43,677 INFO L470 AbstractCegarLoop]: Abstraction has 1036 states and 1884 transitions. [2021-08-06 19:58:43,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:58:43,677 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 1884 transitions. [2021-08-06 19:58:43,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 19:58:43,678 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:58:43,678 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:58:43,706 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2021-08-06 19:58:43,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-08-06 19:58:43,878 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:58:43,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:58:43,879 INFO L82 PathProgramCache]: Analyzing trace with hash 349476180, now seen corresponding path program 106 times [2021-08-06 19:58:43,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:58:43,879 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868795000] [2021-08-06 19:58:43,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:58:43,879 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:58:43,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:58:43,963 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 34, result has 42.4 percent of original size [2021-08-06 19:58:43,966 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 34, result has 42.4 percent of original size [2021-08-06 19:58:43,990 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 38, result has 53.7 percent of original size [2021-08-06 19:58:43,994 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 38, result has 53.7 percent of original size [2021-08-06 19:58:44,033 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 99, result has 20.8 percent of original size [2021-08-06 19:58:44,037 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 99, result has 20.8 percent of original size [2021-08-06 19:58:44,066 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 11.1 percent of original size [2021-08-06 19:58:44,067 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 11.1 percent of original size [2021-08-06 19:58:44,076 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 19:58:44,076 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 19:58:44,096 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:58:44,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:58:44,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868795000] [2021-08-06 19:58:44,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868795000] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:58:44,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823123683] [2021-08-06 19:58:44,097 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:58:44,097 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:58:44,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:58:44,097 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:58:44,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2021-08-06 19:58:48,977 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:58:48,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:58:48,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 19:58:48,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:58:49,078 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:58:49,080 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:58:50,043 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:58:50,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823123683] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:58:50,044 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:58:50,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 19:58:50,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129837921] [2021-08-06 19:58:50,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 19:58:50,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:58:50,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 19:58:50,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:58:50,044 INFO L87 Difference]: Start difference. First operand 1036 states and 1884 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:58:50,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:58:50,505 INFO L93 Difference]: Finished difference Result 1294 states and 2294 transitions. [2021-08-06 19:58:50,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 19:58:50,505 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 19:58:50,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:58:50,506 INFO L225 Difference]: With dead ends: 1294 [2021-08-06 19:58:50,506 INFO L226 Difference]: Without dead ends: 1279 [2021-08-06 19:58:50,506 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 647.3ms TimeCoverageRelationStatistics Valid=203, Invalid=919, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 19:58:50,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2021-08-06 19:58:50,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 1043. [2021-08-06 19:58:50,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1043 states, 1042 states have (on average 1.8186180422264875) internal successors, (1895), 1042 states have internal predecessors, (1895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:58:50,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1043 states to 1043 states and 1895 transitions. [2021-08-06 19:58:50,516 INFO L78 Accepts]: Start accepts. Automaton has 1043 states and 1895 transitions. Word has length 30 [2021-08-06 19:58:50,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:58:50,516 INFO L470 AbstractCegarLoop]: Abstraction has 1043 states and 1895 transitions. [2021-08-06 19:58:50,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:58:50,516 INFO L276 IsEmpty]: Start isEmpty. Operand 1043 states and 1895 transitions. [2021-08-06 19:58:50,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 19:58:50,517 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:58:50,517 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:58:50,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2021-08-06 19:58:50,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:58:50,717 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:58:50,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:58:50,718 INFO L82 PathProgramCache]: Analyzing trace with hash 31754256, now seen corresponding path program 107 times [2021-08-06 19:58:50,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:58:50,718 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2421802] [2021-08-06 19:58:50,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:58:50,718 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:58:50,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:58:50,807 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 62, result has 41.0 percent of original size [2021-08-06 19:58:50,812 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 62, result has 41.0 percent of original size [2021-08-06 19:58:50,849 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 68, result has 37.0 percent of original size [2021-08-06 19:58:50,853 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 68, result has 37.0 percent of original size [2021-08-06 19:58:50,885 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 96, result has 29.4 percent of original size [2021-08-06 19:58:50,965 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 96, result has 29.4 percent of original size [2021-08-06 19:58:50,995 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 61, result has 4.7 percent of original size [2021-08-06 19:58:50,997 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 61, result has 4.7 percent of original size [2021-08-06 19:58:51,005 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 19:58:51,006 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 19:58:51,026 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:58:51,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:58:51,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2421802] [2021-08-06 19:58:51,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2421802] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:58:51,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464246515] [2021-08-06 19:58:51,027 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:58:51,027 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:58:51,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:58:51,028 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:58:51,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2021-08-06 19:58:55,951 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 19:58:55,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:58:55,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 19:58:55,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:58:56,053 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:58:56,055 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:58:57,115 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:58:57,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464246515] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:58:57,115 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:58:57,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 19:58:57,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341432390] [2021-08-06 19:58:57,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 19:58:57,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:58:57,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 19:58:57,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:58:57,116 INFO L87 Difference]: Start difference. First operand 1043 states and 1895 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:58:57,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:58:57,707 INFO L93 Difference]: Finished difference Result 1284 states and 2274 transitions. [2021-08-06 19:58:57,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 19:58:57,707 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 19:58:57,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:58:57,709 INFO L225 Difference]: With dead ends: 1284 [2021-08-06 19:58:57,709 INFO L226 Difference]: Without dead ends: 1269 [2021-08-06 19:58:57,709 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 773.8ms TimeCoverageRelationStatistics Valid=227, Invalid=1033, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 19:58:57,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1269 states. [2021-08-06 19:58:57,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1269 to 1055. [2021-08-06 19:58:57,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1055 states, 1054 states have (on average 1.8187855787476281) internal successors, (1917), 1054 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:58:57,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1055 states to 1055 states and 1917 transitions. [2021-08-06 19:58:57,718 INFO L78 Accepts]: Start accepts. Automaton has 1055 states and 1917 transitions. Word has length 30 [2021-08-06 19:58:57,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:58:57,718 INFO L470 AbstractCegarLoop]: Abstraction has 1055 states and 1917 transitions. [2021-08-06 19:58:57,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:58:57,718 INFO L276 IsEmpty]: Start isEmpty. Operand 1055 states and 1917 transitions. [2021-08-06 19:58:57,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 19:58:57,719 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:58:57,719 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:58:57,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2021-08-06 19:58:57,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:58:57,921 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:58:57,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:58:57,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1306896656, now seen corresponding path program 108 times [2021-08-06 19:58:57,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:58:57,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898447137] [2021-08-06 19:58:57,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:58:57,921 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:58:57,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:58:58,027 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 82, result has 34.4 percent of original size [2021-08-06 19:58:58,032 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 82, result has 34.4 percent of original size [2021-08-06 19:58:58,064 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 90, result has 34.8 percent of original size [2021-08-06 19:58:58,070 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 90, result has 34.8 percent of original size [2021-08-06 19:58:58,104 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 35, result has 7.9 percent of original size [2021-08-06 19:58:58,105 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 35, result has 7.9 percent of original size [2021-08-06 19:58:58,114 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 19:58:58,115 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 19:58:58,135 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:58:58,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:58:58,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898447137] [2021-08-06 19:58:58,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898447137] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:58:58,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154332592] [2021-08-06 19:58:58,135 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:58:58,135 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:58:58,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:58:58,136 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:58:58,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2021-08-06 19:59:03,167 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-06 19:59:03,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:59:03,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 19:59:03,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:59:03,269 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:59:03,271 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:59:04,231 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:59:04,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154332592] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:59:04,231 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:59:04,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 19:59:04,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697251720] [2021-08-06 19:59:04,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 19:59:04,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:59:04,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 19:59:04,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:59:04,232 INFO L87 Difference]: Start difference. First operand 1055 states and 1917 transitions. Second operand has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:59:04,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:59:04,668 INFO L93 Difference]: Finished difference Result 1291 states and 2293 transitions. [2021-08-06 19:59:04,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 19:59:04,668 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 19:59:04,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:59:04,670 INFO L225 Difference]: With dead ends: 1291 [2021-08-06 19:59:04,670 INFO L226 Difference]: Without dead ends: 1276 [2021-08-06 19:59:04,670 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 638.9ms TimeCoverageRelationStatistics Valid=206, Invalid=916, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 19:59:04,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2021-08-06 19:59:04,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 1069. [2021-08-06 19:59:04,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1069 states, 1068 states have (on average 1.8164794007490637) internal successors, (1940), 1068 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:59:04,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 1940 transitions. [2021-08-06 19:59:04,679 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 1940 transitions. Word has length 30 [2021-08-06 19:59:04,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:59:04,679 INFO L470 AbstractCegarLoop]: Abstraction has 1069 states and 1940 transitions. [2021-08-06 19:59:04,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:59:04,679 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 1940 transitions. [2021-08-06 19:59:04,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 19:59:04,680 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:59:04,680 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:59:04,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2021-08-06 19:59:04,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-08-06 19:59:04,881 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:59:04,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:59:04,881 INFO L82 PathProgramCache]: Analyzing trace with hash 968559120, now seen corresponding path program 109 times [2021-08-06 19:59:04,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:59:04,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994697087] [2021-08-06 19:59:04,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:59:04,882 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:59:04,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:59:04,989 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 116, result has 15.9 percent of original size [2021-08-06 19:59:04,992 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 116, result has 15.9 percent of original size [2021-08-06 19:59:05,013 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 113, result has 26.6 percent of original size [2021-08-06 19:59:05,019 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 113, result has 26.6 percent of original size [2021-08-06 19:59:05,045 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 11.1 percent of original size [2021-08-06 19:59:05,046 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 11.1 percent of original size [2021-08-06 19:59:05,054 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 19:59:05,055 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 19:59:05,075 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:59:05,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:59:05,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994697087] [2021-08-06 19:59:05,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994697087] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:59:05,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933153774] [2021-08-06 19:59:05,075 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:59:05,075 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:59:05,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:59:05,076 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:59:05,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2021-08-06 19:59:10,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:59:10,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 19:59:10,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:59:10,297 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:59:10,298 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 56.8 percent of original size [2021-08-06 19:59:11,129 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:59:11,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933153774] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:59:11,130 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:59:11,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 19:59:11,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868928074] [2021-08-06 19:59:11,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 19:59:11,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:59:11,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 19:59:11,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:59:11,130 INFO L87 Difference]: Start difference. First operand 1069 states and 1940 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:59:11,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:59:11,591 INFO L93 Difference]: Finished difference Result 1316 states and 2325 transitions. [2021-08-06 19:59:11,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 19:59:11,591 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 19:59:11,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:59:11,593 INFO L225 Difference]: With dead ends: 1316 [2021-08-06 19:59:11,593 INFO L226 Difference]: Without dead ends: 1301 [2021-08-06 19:59:11,593 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 579.5ms TimeCoverageRelationStatistics Valid=258, Invalid=1074, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 19:59:11,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1301 states. [2021-08-06 19:59:11,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1301 to 1081. [2021-08-06 19:59:11,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1081 states, 1080 states have (on average 1.8166666666666667) internal successors, (1962), 1080 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:59:11,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1081 states to 1081 states and 1962 transitions. [2021-08-06 19:59:11,602 INFO L78 Accepts]: Start accepts. Automaton has 1081 states and 1962 transitions. Word has length 30 [2021-08-06 19:59:11,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:59:11,603 INFO L470 AbstractCegarLoop]: Abstraction has 1081 states and 1962 transitions. [2021-08-06 19:59:11,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:59:11,603 INFO L276 IsEmpty]: Start isEmpty. Operand 1081 states and 1962 transitions. [2021-08-06 19:59:11,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 19:59:11,604 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:59:11,604 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:59:11,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2021-08-06 19:59:11,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:59:11,804 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:59:11,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:59:11,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1287957400, now seen corresponding path program 110 times [2021-08-06 19:59:11,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:59:11,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674883002] [2021-08-06 19:59:11,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:59:11,805 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:59:11,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:59:11,862 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 642, result has 3.3 percent of original size [2021-08-06 19:59:11,870 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 642, result has 3.3 percent of original size [2021-08-06 19:59:11,892 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 631, result has 4.5 percent of original size [2021-08-06 19:59:11,903 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 631, result has 4.5 percent of original size [2021-08-06 19:59:11,930 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 885, result has 4.1 percent of original size [2021-08-06 19:59:11,951 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 885, result has 4.1 percent of original size [2021-08-06 19:59:11,992 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1593, result has 3.2 percent of original size [2021-08-06 19:59:12,003 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1593, result has 3.2 percent of original size [2021-08-06 19:59:12,045 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1613, result has 1.1 percent of original size [2021-08-06 19:59:12,051 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1613, result has 1.1 percent of original size [2021-08-06 19:59:12,079 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 861, result has 1.5 percent of original size [2021-08-06 19:59:12,089 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 861, result has 1.5 percent of original size [2021-08-06 19:59:12,105 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 19:59:12,106 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 19:59:12,125 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:59:12,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:59:12,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674883002] [2021-08-06 19:59:12,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674883002] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:59:12,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589067226] [2021-08-06 19:59:12,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:59:12,126 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:59:12,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:59:12,126 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:59:12,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2021-08-06 19:59:17,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:59:17,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:59:17,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 19:59:17,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:59:17,475 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 19:59:17,478 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 19:59:18,548 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:59:18,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589067226] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:59:18,548 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:59:18,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 19:59:18,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448020231] [2021-08-06 19:59:18,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 19:59:18,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:59:18,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 19:59:18,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:59:18,549 INFO L87 Difference]: Start difference. First operand 1081 states and 1962 transitions. Second operand has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:59:19,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:59:19,207 INFO L93 Difference]: Finished difference Result 1258 states and 2223 transitions. [2021-08-06 19:59:19,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 19:59:19,207 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 19:59:19,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:59:19,209 INFO L225 Difference]: With dead ends: 1258 [2021-08-06 19:59:19,209 INFO L226 Difference]: Without dead ends: 1243 [2021-08-06 19:59:19,209 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 895.0ms TimeCoverageRelationStatistics Valid=281, Invalid=979, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 19:59:19,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1243 states. [2021-08-06 19:59:19,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1243 to 1089. [2021-08-06 19:59:19,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1089 states, 1088 states have (on average 1.8152573529411764) internal successors, (1975), 1088 states have internal predecessors, (1975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:59:19,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1089 states to 1089 states and 1975 transitions. [2021-08-06 19:59:19,218 INFO L78 Accepts]: Start accepts. Automaton has 1089 states and 1975 transitions. Word has length 30 [2021-08-06 19:59:19,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:59:19,218 INFO L470 AbstractCegarLoop]: Abstraction has 1089 states and 1975 transitions. [2021-08-06 19:59:19,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:59:19,218 INFO L276 IsEmpty]: Start isEmpty. Operand 1089 states and 1975 transitions. [2021-08-06 19:59:19,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 19:59:19,219 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:59:19,219 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:59:19,249 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2021-08-06 19:59:19,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:59:19,419 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:59:19,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:59:19,420 INFO L82 PathProgramCache]: Analyzing trace with hash -648750764, now seen corresponding path program 111 times [2021-08-06 19:59:19,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:59:19,420 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667468068] [2021-08-06 19:59:19,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:59:19,420 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:59:19,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:59:19,475 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 180, result has 8.6 percent of original size [2021-08-06 19:59:19,478 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 180, result has 8.6 percent of original size [2021-08-06 19:59:19,496 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 180, result has 8.6 percent of original size [2021-08-06 19:59:19,499 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 180, result has 8.6 percent of original size [2021-08-06 19:59:19,519 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 270, result has 10.6 percent of original size [2021-08-06 19:59:19,525 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 270, result has 10.6 percent of original size [2021-08-06 19:59:19,561 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 485, result has 4.7 percent of original size [2021-08-06 19:59:19,565 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 485, result has 4.7 percent of original size [2021-08-06 19:59:19,592 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 463, result has 5.9 percent of original size [2021-08-06 19:59:19,597 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 463, result has 5.9 percent of original size [2021-08-06 19:59:19,626 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 411, result has 3.1 percent of original size [2021-08-06 19:59:19,630 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 411, result has 3.1 percent of original size [2021-08-06 19:59:19,646 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 19:59:19,647 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 19:59:19,667 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:59:19,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:59:19,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667468068] [2021-08-06 19:59:19,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667468068] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:59:19,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863359593] [2021-08-06 19:59:19,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:59:19,667 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:59:19,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:59:19,668 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:59:19,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2021-08-06 19:59:24,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-06 19:59:24,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:59:24,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 19:59:24,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:59:25,093 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 19:59:25,096 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 19:59:25,971 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:59:25,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863359593] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:59:25,971 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:59:25,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 19:59:25,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150931775] [2021-08-06 19:59:25,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 19:59:25,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:59:25,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 19:59:25,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:59:25,972 INFO L87 Difference]: Start difference. First operand 1089 states and 1975 transitions. Second operand has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:59:26,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:59:26,797 INFO L93 Difference]: Finished difference Result 1275 states and 2258 transitions. [2021-08-06 19:59:26,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 19:59:26,797 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 19:59:26,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:59:26,798 INFO L225 Difference]: With dead ends: 1275 [2021-08-06 19:59:26,798 INFO L226 Difference]: Without dead ends: 1260 [2021-08-06 19:59:26,799 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 1013.1ms TimeCoverageRelationStatistics Valid=295, Invalid=1187, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 19:59:26,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1260 states. [2021-08-06 19:59:26,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1260 to 1101. [2021-08-06 19:59:26,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1101 states, 1100 states have (on average 1.82) internal successors, (2002), 1100 states have internal predecessors, (2002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:59:26,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 2002 transitions. [2021-08-06 19:59:26,808 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 2002 transitions. Word has length 30 [2021-08-06 19:59:26,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:59:26,808 INFO L470 AbstractCegarLoop]: Abstraction has 1101 states and 2002 transitions. [2021-08-06 19:59:26,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:59:26,808 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 2002 transitions. [2021-08-06 19:59:26,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 19:59:26,809 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:59:26,809 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:59:26,838 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2021-08-06 19:59:27,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:59:27,009 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:59:27,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:59:27,010 INFO L82 PathProgramCache]: Analyzing trace with hash 931371732, now seen corresponding path program 112 times [2021-08-06 19:59:27,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:59:27,010 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779085484] [2021-08-06 19:59:27,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:59:27,010 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:59:27,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:59:27,063 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 34.1 percent of original size [2021-08-06 19:59:27,065 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 34.1 percent of original size [2021-08-06 19:59:27,080 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 34.1 percent of original size [2021-08-06 19:59:27,082 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 34.1 percent of original size [2021-08-06 19:59:27,105 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1561, result has 1.7 percent of original size [2021-08-06 19:59:27,122 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1561, result has 1.7 percent of original size [2021-08-06 19:59:27,153 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4316, result has 0.3 percent of original size [2021-08-06 19:59:27,159 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4316, result has 0.3 percent of original size [2021-08-06 19:59:27,174 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4223, result has 0.1 percent of original size [2021-08-06 19:59:27,176 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4223, result has 0.1 percent of original size [2021-08-06 19:59:27,184 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 908, result has 0.3 percent of original size [2021-08-06 19:59:27,185 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 908, result has 0.3 percent of original size [2021-08-06 19:59:27,194 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 19:59:27,195 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 19:59:27,215 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:59:27,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:59:27,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779085484] [2021-08-06 19:59:27,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779085484] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:59:27,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205342290] [2021-08-06 19:59:27,215 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:59:27,216 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:59:27,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:59:27,216 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:59:27,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2021-08-06 19:59:32,521 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:59:32,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:59:32,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 19:59:32,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:59:32,701 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 19:59:32,704 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 19:59:33,636 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:59:33,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205342290] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:59:33,637 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:59:33,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 19:59:33,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247132214] [2021-08-06 19:59:33,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 19:59:33,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:59:33,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 19:59:33,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:59:33,637 INFO L87 Difference]: Start difference. First operand 1101 states and 2002 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:59:34,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:59:34,208 INFO L93 Difference]: Finished difference Result 1352 states and 2388 transitions. [2021-08-06 19:59:34,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 19:59:34,209 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 19:59:34,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:59:34,211 INFO L225 Difference]: With dead ends: 1352 [2021-08-06 19:59:34,211 INFO L226 Difference]: Without dead ends: 1337 [2021-08-06 19:59:34,211 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 749.5ms TimeCoverageRelationStatistics Valid=251, Invalid=1081, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 19:59:34,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1337 states. [2021-08-06 19:59:34,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1337 to 1085. [2021-08-06 19:59:34,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1085 states, 1084 states have (on average 1.8228782287822878) internal successors, (1976), 1084 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:59:34,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1085 states to 1085 states and 1976 transitions. [2021-08-06 19:59:34,222 INFO L78 Accepts]: Start accepts. Automaton has 1085 states and 1976 transitions. Word has length 30 [2021-08-06 19:59:34,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:59:34,222 INFO L470 AbstractCegarLoop]: Abstraction has 1085 states and 1976 transitions. [2021-08-06 19:59:34,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:59:34,222 INFO L276 IsEmpty]: Start isEmpty. Operand 1085 states and 1976 transitions. [2021-08-06 19:59:34,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 19:59:34,223 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:59:34,223 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:59:34,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2021-08-06 19:59:34,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:59:34,424 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:59:34,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:59:34,424 INFO L82 PathProgramCache]: Analyzing trace with hash -2088453164, now seen corresponding path program 113 times [2021-08-06 19:59:34,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:59:34,424 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246676969] [2021-08-06 19:59:34,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:59:34,425 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:59:34,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:59:34,546 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 338, result has 4.0 percent of original size [2021-08-06 19:59:34,550 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 338, result has 4.0 percent of original size [2021-08-06 19:59:34,566 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 338, result has 4.0 percent of original size [2021-08-06 19:59:34,569 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 338, result has 4.0 percent of original size [2021-08-06 19:59:34,584 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 640, result has 1.1 percent of original size [2021-08-06 19:59:34,585 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 640, result has 1.1 percent of original size [2021-08-06 19:59:34,596 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1046, result has 1.0 percent of original size [2021-08-06 19:59:34,598 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1046, result has 1.0 percent of original size [2021-08-06 19:59:34,613 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1051, result has 0.3 percent of original size [2021-08-06 19:59:34,616 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1051, result has 0.3 percent of original size [2021-08-06 19:59:34,624 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 360, result has 0.8 percent of original size [2021-08-06 19:59:34,625 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 360, result has 0.8 percent of original size [2021-08-06 19:59:34,633 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 19:59:34,634 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 19:59:34,653 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:59:34,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:59:34,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246676969] [2021-08-06 19:59:34,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246676969] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:59:34,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754939799] [2021-08-06 19:59:34,654 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:59:34,654 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:59:34,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:59:34,655 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:59:34,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2021-08-06 19:59:39,984 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-06 19:59:39,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:59:39,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 19:59:39,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:59:40,148 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 19:59:40,151 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 19:59:40,944 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:59:40,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754939799] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:59:40,944 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:59:40,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 19:59:40,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474069481] [2021-08-06 19:59:40,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 19:59:40,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:59:40,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 19:59:40,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:59:40,945 INFO L87 Difference]: Start difference. First operand 1085 states and 1976 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:59:41,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:59:41,459 INFO L93 Difference]: Finished difference Result 1320 states and 2345 transitions. [2021-08-06 19:59:41,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 19:59:41,459 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 19:59:41,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:59:41,460 INFO L225 Difference]: With dead ends: 1320 [2021-08-06 19:59:41,460 INFO L226 Difference]: Without dead ends: 1305 [2021-08-06 19:59:41,461 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 618.1ms TimeCoverageRelationStatistics Valid=264, Invalid=1142, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 19:59:41,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1305 states. [2021-08-06 19:59:41,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1305 to 1081. [2021-08-06 19:59:41,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1081 states, 1080 states have (on average 1.8212962962962962) internal successors, (1967), 1080 states have internal predecessors, (1967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:59:41,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1081 states to 1081 states and 1967 transitions. [2021-08-06 19:59:41,470 INFO L78 Accepts]: Start accepts. Automaton has 1081 states and 1967 transitions. Word has length 30 [2021-08-06 19:59:41,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:59:41,470 INFO L470 AbstractCegarLoop]: Abstraction has 1081 states and 1967 transitions. [2021-08-06 19:59:41,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:59:41,470 INFO L276 IsEmpty]: Start isEmpty. Operand 1081 states and 1967 transitions. [2021-08-06 19:59:41,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 19:59:41,471 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:59:41,471 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:59:41,501 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2021-08-06 19:59:41,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-08-06 19:59:41,672 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:59:41,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:59:41,672 INFO L82 PathProgramCache]: Analyzing trace with hash 269805968, now seen corresponding path program 114 times [2021-08-06 19:59:41,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:59:41,672 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54217475] [2021-08-06 19:59:41,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:59:41,672 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:59:41,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:59:41,730 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 914, result has 1.5 percent of original size [2021-08-06 19:59:41,734 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 914, result has 1.5 percent of original size [2021-08-06 19:59:41,750 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 914, result has 1.5 percent of original size [2021-08-06 19:59:41,755 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 914, result has 1.5 percent of original size [2021-08-06 19:59:41,770 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1058, result has 0.7 percent of original size [2021-08-06 19:59:41,772 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1058, result has 0.7 percent of original size [2021-08-06 19:59:41,785 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 2139, result has 0.5 percent of original size [2021-08-06 19:59:41,847 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 2139, result has 0.5 percent of original size [2021-08-06 19:59:41,870 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 2127, result has 1.1 percent of original size [2021-08-06 19:59:41,882 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 2127, result has 1.1 percent of original size [2021-08-06 19:59:41,902 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 331, result has 5.4 percent of original size [2021-08-06 19:59:41,905 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 331, result has 5.4 percent of original size [2021-08-06 19:59:41,921 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 19:59:41,922 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 19:59:41,942 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:59:41,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:59:41,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54217475] [2021-08-06 19:59:41,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54217475] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:59:41,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898001706] [2021-08-06 19:59:41,942 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:59:41,942 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:59:41,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:59:41,943 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:59:41,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2021-08-06 19:59:47,375 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 19:59:47,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:59:47,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 19:59:47,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:59:47,536 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 19:59:47,539 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 19:59:48,312 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:59:48,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898001706] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:59:48,312 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:59:48,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 19:59:48,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329405142] [2021-08-06 19:59:48,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 19:59:48,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:59:48,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 19:59:48,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:59:48,313 INFO L87 Difference]: Start difference. First operand 1081 states and 1967 transitions. Second operand has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:59:48,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:59:48,852 INFO L93 Difference]: Finished difference Result 1353 states and 2391 transitions. [2021-08-06 19:59:48,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 19:59:48,852 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 19:59:48,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:59:48,853 INFO L225 Difference]: With dead ends: 1353 [2021-08-06 19:59:48,853 INFO L226 Difference]: Without dead ends: 1334 [2021-08-06 19:59:48,854 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 692.5ms TimeCoverageRelationStatistics Valid=306, Invalid=1254, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 19:59:48,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1334 states. [2021-08-06 19:59:48,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1334 to 1093. [2021-08-06 19:59:48,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1093 states, 1092 states have (on average 1.8214285714285714) internal successors, (1989), 1092 states have internal predecessors, (1989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:59:48,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1093 states to 1093 states and 1989 transitions. [2021-08-06 19:59:48,863 INFO L78 Accepts]: Start accepts. Automaton has 1093 states and 1989 transitions. Word has length 30 [2021-08-06 19:59:48,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:59:48,863 INFO L470 AbstractCegarLoop]: Abstraction has 1093 states and 1989 transitions. [2021-08-06 19:59:48,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:59:48,864 INFO L276 IsEmpty]: Start isEmpty. Operand 1093 states and 1989 transitions. [2021-08-06 19:59:48,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 19:59:48,865 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:59:48,865 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:59:48,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2021-08-06 19:59:49,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-08-06 19:59:49,081 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:59:49,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:59:49,081 INFO L82 PathProgramCache]: Analyzing trace with hash 457496268, now seen corresponding path program 115 times [2021-08-06 19:59:49,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:59:49,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064687484] [2021-08-06 19:59:49,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:59:49,081 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:59:49,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:59:49,141 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 652, result has 2.1 percent of original size [2021-08-06 19:59:49,144 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 652, result has 2.1 percent of original size [2021-08-06 19:59:49,159 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 652, result has 2.1 percent of original size [2021-08-06 19:59:49,163 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 652, result has 2.1 percent of original size [2021-08-06 19:59:49,178 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 442, result has 1.6 percent of original size [2021-08-06 19:59:49,179 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 442, result has 1.6 percent of original size [2021-08-06 19:59:49,189 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 691, result has 1.6 percent of original size [2021-08-06 19:59:49,192 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 691, result has 1.6 percent of original size [2021-08-06 19:59:49,208 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 687, result has 1.6 percent of original size [2021-08-06 19:59:49,212 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 687, result has 1.6 percent of original size [2021-08-06 19:59:49,230 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 571, result has 2.2 percent of original size [2021-08-06 19:59:49,237 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 571, result has 2.2 percent of original size [2021-08-06 19:59:49,253 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 19:59:49,253 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 19:59:49,273 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:59:49,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:59:49,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064687484] [2021-08-06 19:59:49,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064687484] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:59:49,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875218057] [2021-08-06 19:59:49,273 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:59:49,273 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:59:49,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:59:49,274 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:59:49,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2021-08-06 19:59:54,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:59:54,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 19:59:54,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:59:54,978 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 19:59:54,980 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 19:59:55,899 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:59:55,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875218057] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:59:55,899 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:59:55,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 19:59:55,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839940486] [2021-08-06 19:59:55,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 19:59:55,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:59:55,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 19:59:55,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:59:55,900 INFO L87 Difference]: Start difference. First operand 1093 states and 1989 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:59:56,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:59:56,408 INFO L93 Difference]: Finished difference Result 1449 states and 2550 transitions. [2021-08-06 19:59:56,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 19:59:56,409 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 19:59:56,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:59:56,410 INFO L225 Difference]: With dead ends: 1449 [2021-08-06 19:59:56,410 INFO L226 Difference]: Without dead ends: 1434 [2021-08-06 19:59:56,411 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 629.4ms TimeCoverageRelationStatistics Valid=279, Invalid=1053, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 19:59:56,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1434 states. [2021-08-06 19:59:56,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1434 to 1097. [2021-08-06 19:59:56,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1097 states, 1096 states have (on average 1.8202554744525548) internal successors, (1995), 1096 states have internal predecessors, (1995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:59:56,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1097 states to 1097 states and 1995 transitions. [2021-08-06 19:59:56,421 INFO L78 Accepts]: Start accepts. Automaton has 1097 states and 1995 transitions. Word has length 30 [2021-08-06 19:59:56,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:59:56,421 INFO L470 AbstractCegarLoop]: Abstraction has 1097 states and 1995 transitions. [2021-08-06 19:59:56,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:59:56,422 INFO L276 IsEmpty]: Start isEmpty. Operand 1097 states and 1995 transitions. [2021-08-06 19:59:56,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 19:59:56,422 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:59:56,422 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:59:56,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2021-08-06 19:59:56,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:59:56,623 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:59:56,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:59:56,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1849928464, now seen corresponding path program 116 times [2021-08-06 19:59:56,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:59:56,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286455109] [2021-08-06 19:59:56,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:59:56,624 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:59:56,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:59:56,677 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 522, result has 2.8 percent of original size [2021-08-06 19:59:56,682 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 522, result has 2.8 percent of original size [2021-08-06 19:59:56,748 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 522, result has 2.8 percent of original size [2021-08-06 19:59:56,753 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 522, result has 2.8 percent of original size [2021-08-06 19:59:56,768 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 728, result has 1.0 percent of original size [2021-08-06 19:59:56,770 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 728, result has 1.0 percent of original size [2021-08-06 19:59:56,780 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 867, result has 0.8 percent of original size [2021-08-06 19:59:56,781 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 867, result has 0.8 percent of original size [2021-08-06 19:59:56,793 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 865, result has 1.3 percent of original size [2021-08-06 19:59:56,796 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 865, result has 1.3 percent of original size [2021-08-06 19:59:56,812 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 367, result has 0.8 percent of original size [2021-08-06 19:59:56,815 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 367, result has 0.8 percent of original size [2021-08-06 19:59:56,823 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 19:59:56,824 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 19:59:56,843 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:59:56,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:59:56,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286455109] [2021-08-06 19:59:56,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286455109] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:59:56,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712224264] [2021-08-06 19:59:56,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:59:56,844 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:59:56,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:59:56,844 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:59:56,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2021-08-06 20:00:02,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:00:02,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:00:02,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 20:00:02,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:00:02,535 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 20:00:02,538 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 20:00:03,331 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:00:03,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712224264] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:00:03,331 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:00:03,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 20:00:03,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748073974] [2021-08-06 20:00:03,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 20:00:03,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:00:03,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 20:00:03,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-08-06 20:00:03,332 INFO L87 Difference]: Start difference. First operand 1097 states and 1995 transitions. Second operand has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:00:03,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:00:03,816 INFO L93 Difference]: Finished difference Result 1346 states and 2384 transitions. [2021-08-06 20:00:03,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 20:00:03,816 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:00:03,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:00:03,817 INFO L225 Difference]: With dead ends: 1346 [2021-08-06 20:00:03,817 INFO L226 Difference]: Without dead ends: 1331 [2021-08-06 20:00:03,818 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 589.7ms TimeCoverageRelationStatistics Valid=279, Invalid=1127, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 20:00:03,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1331 states. [2021-08-06 20:00:03,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1331 to 1101. [2021-08-06 20:00:03,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1101 states, 1100 states have (on average 1.8172727272727274) internal successors, (1999), 1100 states have internal predecessors, (1999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:00:03,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 1999 transitions. [2021-08-06 20:00:03,829 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 1999 transitions. Word has length 30 [2021-08-06 20:00:03,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:00:03,829 INFO L470 AbstractCegarLoop]: Abstraction has 1101 states and 1999 transitions. [2021-08-06 20:00:03,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:00:03,829 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 1999 transitions. [2021-08-06 20:00:03,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:00:03,830 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:00:03,830 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:00:03,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2021-08-06 20:00:04,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-08-06 20:00:04,032 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:00:04,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:00:04,032 INFO L82 PathProgramCache]: Analyzing trace with hash -760534256, now seen corresponding path program 117 times [2021-08-06 20:00:04,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:00:04,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805605495] [2021-08-06 20:00:04,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:00:04,032 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:00:04,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:00:04,118 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 55.6 percent of original size [2021-08-06 20:00:04,120 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 55.6 percent of original size [2021-08-06 20:00:04,135 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 20:00:04,136 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 20:00:04,158 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 96, result has 10.3 percent of original size [2021-08-06 20:00:04,160 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 96, result has 10.3 percent of original size [2021-08-06 20:00:04,174 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 161, result has 6.4 percent of original size [2021-08-06 20:00:04,176 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 161, result has 6.4 percent of original size [2021-08-06 20:00:04,191 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 109, result has 2.7 percent of original size [2021-08-06 20:00:04,192 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 109, result has 2.7 percent of original size [2021-08-06 20:00:04,200 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 20:00:04,201 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 20:00:04,220 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:00:04,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:00:04,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805605495] [2021-08-06 20:00:04,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805605495] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:00:04,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090868661] [2021-08-06 20:00:04,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:00:04,221 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:00:04,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:00:04,221 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:00:04,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2021-08-06 20:00:09,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-06 20:00:09,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:00:09,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 20:00:09,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:00:10,120 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 20:00:10,123 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 20:00:10,874 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:00:10,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090868661] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:00:10,874 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:00:10,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 20:00:10,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565676928] [2021-08-06 20:00:10,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 20:00:10,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:00:10,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 20:00:10,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2021-08-06 20:00:10,875 INFO L87 Difference]: Start difference. First operand 1101 states and 1999 transitions. Second operand has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:00:11,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:00:11,485 INFO L93 Difference]: Finished difference Result 1347 states and 2392 transitions. [2021-08-06 20:00:11,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 20:00:11,486 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:00:11,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:00:11,487 INFO L225 Difference]: With dead ends: 1347 [2021-08-06 20:00:11,487 INFO L226 Difference]: Without dead ends: 1332 [2021-08-06 20:00:11,487 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 725.4ms TimeCoverageRelationStatistics Valid=285, Invalid=1121, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 20:00:11,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1332 states. [2021-08-06 20:00:11,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1332 to 1117. [2021-08-06 20:00:11,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1117 states, 1116 states have (on average 1.8154121863799284) internal successors, (2026), 1116 states have internal predecessors, (2026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:00:11,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1117 states to 1117 states and 2026 transitions. [2021-08-06 20:00:11,497 INFO L78 Accepts]: Start accepts. Automaton has 1117 states and 2026 transitions. Word has length 30 [2021-08-06 20:00:11,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:00:11,497 INFO L470 AbstractCegarLoop]: Abstraction has 1117 states and 2026 transitions. [2021-08-06 20:00:11,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:00:11,498 INFO L276 IsEmpty]: Start isEmpty. Operand 1117 states and 2026 transitions. [2021-08-06 20:00:11,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:00:11,499 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:00:11,499 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:00:11,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2021-08-06 20:00:11,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-08-06 20:00:11,701 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:00:11,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:00:11,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1098871792, now seen corresponding path program 118 times [2021-08-06 20:00:11,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:00:11,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457174317] [2021-08-06 20:00:11,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:00:11,702 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:00:11,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:00:11,770 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 78.6 percent of original size [2021-08-06 20:00:11,772 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 78.6 percent of original size [2021-08-06 20:00:11,793 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 71.4 percent of original size [2021-08-06 20:00:11,795 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 71.4 percent of original size [2021-08-06 20:00:11,842 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 68, result has 41.4 percent of original size [2021-08-06 20:00:11,847 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 68, result has 41.4 percent of original size [2021-08-06 20:00:11,879 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 144, result has 32.1 percent of original size [2021-08-06 20:00:11,891 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 144, result has 32.1 percent of original size [2021-08-06 20:00:11,979 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 214, result has 4.9 percent of original size [2021-08-06 20:00:11,982 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 214, result has 4.9 percent of original size [2021-08-06 20:00:11,999 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 20:00:12,000 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 20:00:12,020 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:00:12,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:00:12,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457174317] [2021-08-06 20:00:12,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457174317] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:00:12,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061838272] [2021-08-06 20:00:12,020 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:00:12,020 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:00:12,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:00:12,021 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:00:12,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2021-08-06 20:00:17,720 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:00:17,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:00:17,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 20:00:17,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:00:17,963 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 20:00:17,966 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 20:00:18,712 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:00:18,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061838272] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:00:18,713 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:00:18,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 20:00:18,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366756828] [2021-08-06 20:00:18,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 20:00:18,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:00:18,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 20:00:18,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-08-06 20:00:18,714 INFO L87 Difference]: Start difference. First operand 1117 states and 2026 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:00:19,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:00:19,173 INFO L93 Difference]: Finished difference Result 1280 states and 2284 transitions. [2021-08-06 20:00:19,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 20:00:19,173 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:00:19,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:00:19,175 INFO L225 Difference]: With dead ends: 1280 [2021-08-06 20:00:19,175 INFO L226 Difference]: Without dead ends: 1265 [2021-08-06 20:00:19,176 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 627.9ms TimeCoverageRelationStatistics Valid=192, Invalid=998, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 20:00:19,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1265 states. [2021-08-06 20:00:19,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1265 to 1128. [2021-08-06 20:00:19,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1128 states, 1127 states have (on average 1.8154392191659272) internal successors, (2046), 1127 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:00:19,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1128 states to 1128 states and 2046 transitions. [2021-08-06 20:00:19,187 INFO L78 Accepts]: Start accepts. Automaton has 1128 states and 2046 transitions. Word has length 30 [2021-08-06 20:00:19,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:00:19,187 INFO L470 AbstractCegarLoop]: Abstraction has 1128 states and 2046 transitions. [2021-08-06 20:00:19,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:00:19,187 INFO L276 IsEmpty]: Start isEmpty. Operand 1128 states and 2046 transitions. [2021-08-06 20:00:19,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:00:19,188 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:00:19,189 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:00:19,222 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2021-08-06 20:00:19,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-08-06 20:00:19,394 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:00:19,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:00:19,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1465325772, now seen corresponding path program 119 times [2021-08-06 20:00:19,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:00:19,394 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094410052] [2021-08-06 20:00:19,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:00:19,394 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:00:19,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:00:19,451 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 88.0 percent of original size [2021-08-06 20:00:19,453 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 88.0 percent of original size [2021-08-06 20:00:19,476 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 89.3 percent of original size [2021-08-06 20:00:19,478 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 89.3 percent of original size [2021-08-06 20:00:19,519 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 54, result has 28.0 percent of original size [2021-08-06 20:00:19,522 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 54, result has 28.0 percent of original size [2021-08-06 20:00:19,541 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 103, result has 16.9 percent of original size [2021-08-06 20:00:19,544 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 103, result has 16.9 percent of original size [2021-08-06 20:00:19,565 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 160, result has 1.8 percent of original size [2021-08-06 20:00:19,567 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 160, result has 1.8 percent of original size [2021-08-06 20:00:19,575 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 20:00:19,576 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 20:00:19,596 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:00:19,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:00:19,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094410052] [2021-08-06 20:00:19,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094410052] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:00:19,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089278637] [2021-08-06 20:00:19,597 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:00:19,597 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:00:19,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:00:19,601 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:00:19,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2021-08-06 20:00:25,427 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-06 20:00:25,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:00:25,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 20:00:25,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:00:25,704 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 20:00:25,707 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 20:00:26,484 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:00:26,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089278637] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:00:26,485 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:00:26,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 20:00:26,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951421814] [2021-08-06 20:00:26,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 20:00:26,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:00:26,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 20:00:26,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-08-06 20:00:26,485 INFO L87 Difference]: Start difference. First operand 1128 states and 2046 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:00:27,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:00:27,027 INFO L93 Difference]: Finished difference Result 1380 states and 2442 transitions. [2021-08-06 20:00:27,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 20:00:27,027 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:00:27,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:00:27,029 INFO L225 Difference]: With dead ends: 1380 [2021-08-06 20:00:27,029 INFO L226 Difference]: Without dead ends: 1365 [2021-08-06 20:00:27,029 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 688.6ms TimeCoverageRelationStatistics Valid=241, Invalid=1019, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 20:00:27,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1365 states. [2021-08-06 20:00:27,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1365 to 1133. [2021-08-06 20:00:27,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1133 states, 1132 states have (on average 1.8171378091872792) internal successors, (2057), 1132 states have internal predecessors, (2057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:00:27,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1133 states to 1133 states and 2057 transitions. [2021-08-06 20:00:27,041 INFO L78 Accepts]: Start accepts. Automaton has 1133 states and 2057 transitions. Word has length 30 [2021-08-06 20:00:27,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:00:27,041 INFO L470 AbstractCegarLoop]: Abstraction has 1133 states and 2057 transitions. [2021-08-06 20:00:27,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:00:27,041 INFO L276 IsEmpty]: Start isEmpty. Operand 1133 states and 2057 transitions. [2021-08-06 20:00:27,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:00:27,042 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:00:27,042 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:00:27,075 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2021-08-06 20:00:27,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-08-06 20:00:27,243 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:00:27,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:00:27,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1742189424, now seen corresponding path program 120 times [2021-08-06 20:00:27,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:00:27,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593225941] [2021-08-06 20:00:27,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:00:27,243 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:00:27,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:00:27,301 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:00:27,303 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:00:27,317 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 20:00:27,318 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 20:00:27,327 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 176, result has 3.8 percent of original size [2021-08-06 20:00:27,329 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 176, result has 3.8 percent of original size [2021-08-06 20:00:27,340 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 140, result has 11.4 percent of original size [2021-08-06 20:00:27,343 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 140, result has 11.4 percent of original size [2021-08-06 20:00:27,361 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 284, result has 7.2 percent of original size [2021-08-06 20:00:27,366 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 284, result has 7.2 percent of original size [2021-08-06 20:00:27,388 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 334, result has 7.7 percent of original size [2021-08-06 20:00:27,395 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 334, result has 7.7 percent of original size [2021-08-06 20:00:27,414 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 20:00:27,415 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 20:00:27,434 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:00:27,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:00:27,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593225941] [2021-08-06 20:00:27,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593225941] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:00:27,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322375351] [2021-08-06 20:00:27,434 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:00:27,434 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:00:27,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:00:27,435 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:00:27,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2021-08-06 20:00:33,264 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 20:00:33,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:00:33,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 20:00:33,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:00:33,580 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 61.0 percent of original size [2021-08-06 20:00:33,582 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 61.0 percent of original size [2021-08-06 20:00:33,962 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:00:33,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322375351] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:00:33,963 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:00:33,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 20:00:33,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571545099] [2021-08-06 20:00:33,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 20:00:33,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:00:33,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 20:00:33,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-08-06 20:00:33,964 INFO L87 Difference]: Start difference. First operand 1133 states and 2057 transitions. Second operand has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:00:34,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:00:34,600 INFO L93 Difference]: Finished difference Result 1372 states and 2431 transitions. [2021-08-06 20:00:34,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 20:00:34,600 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:00:34,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:00:34,602 INFO L225 Difference]: With dead ends: 1372 [2021-08-06 20:00:34,602 INFO L226 Difference]: Without dead ends: 1353 [2021-08-06 20:00:34,602 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 701.0ms TimeCoverageRelationStatistics Valid=363, Invalid=1359, Unknown=0, NotChecked=0, Total=1722 [2021-08-06 20:00:34,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1353 states. [2021-08-06 20:00:34,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1353 to 1150. [2021-08-06 20:00:34,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1149 states have (on average 1.8189730200174064) internal successors, (2090), 1149 states have internal predecessors, (2090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:00:34,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 2090 transitions. [2021-08-06 20:00:34,612 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 2090 transitions. Word has length 30 [2021-08-06 20:00:34,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:00:34,612 INFO L470 AbstractCegarLoop]: Abstraction has 1150 states and 2090 transitions. [2021-08-06 20:00:34,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:00:34,612 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 2090 transitions. [2021-08-06 20:00:34,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:00:34,613 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:00:34,613 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:00:34,648 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2021-08-06 20:00:34,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:00:34,815 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:00:34,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:00:34,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1554499124, now seen corresponding path program 121 times [2021-08-06 20:00:34,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:00:34,816 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771399359] [2021-08-06 20:00:34,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:00:34,816 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:00:34,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:00:34,880 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 78.6 percent of original size [2021-08-06 20:00:34,882 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 78.6 percent of original size [2021-08-06 20:00:34,906 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 71.4 percent of original size [2021-08-06 20:00:34,909 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 71.4 percent of original size [2021-08-06 20:00:34,930 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 86, result has 22.5 percent of original size [2021-08-06 20:00:34,933 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 86, result has 22.5 percent of original size [2021-08-06 20:00:34,954 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 54, result has 47.1 percent of original size [2021-08-06 20:00:34,959 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 54, result has 47.1 percent of original size [2021-08-06 20:00:34,992 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 62, result has 41.5 percent of original size [2021-08-06 20:00:34,997 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 62, result has 41.5 percent of original size [2021-08-06 20:00:35,034 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 122, result has 8.3 percent of original size [2021-08-06 20:00:35,037 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 122, result has 8.3 percent of original size [2021-08-06 20:00:35,052 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 20:00:35,052 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 20:00:35,072 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:00:35,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:00:35,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771399359] [2021-08-06 20:00:35,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771399359] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:00:35,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336364187] [2021-08-06 20:00:35,072 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:00:35,072 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:00:35,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:00:35,073 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:00:35,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2021-08-06 20:00:40,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:00:40,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 20:00:40,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:00:41,341 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 73.3 percent of original size [2021-08-06 20:00:41,345 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 73.3 percent of original size [2021-08-06 20:00:41,999 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:00:42,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336364187] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:00:42,000 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:00:42,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 20:00:42,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5684428] [2021-08-06 20:00:42,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 20:00:42,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:00:42,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 20:00:42,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-08-06 20:00:42,001 INFO L87 Difference]: Start difference. First operand 1150 states and 2090 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:00:42,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:00:42,509 INFO L93 Difference]: Finished difference Result 1257 states and 2255 transitions. [2021-08-06 20:00:42,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 20:00:42,510 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:00:42,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:00:42,511 INFO L225 Difference]: With dead ends: 1257 [2021-08-06 20:00:42,511 INFO L226 Difference]: Without dead ends: 1246 [2021-08-06 20:00:42,511 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 698.4ms TimeCoverageRelationStatistics Valid=178, Invalid=1082, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 20:00:42,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1246 states. [2021-08-06 20:00:42,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1246 to 1149. [2021-08-06 20:00:42,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1149 states, 1148 states have (on average 1.818815331010453) internal successors, (2088), 1148 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:00:42,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1149 states to 1149 states and 2088 transitions. [2021-08-06 20:00:42,521 INFO L78 Accepts]: Start accepts. Automaton has 1149 states and 2088 transitions. Word has length 30 [2021-08-06 20:00:42,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:00:42,521 INFO L470 AbstractCegarLoop]: Abstraction has 1149 states and 2088 transitions. [2021-08-06 20:00:42,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:00:42,521 INFO L276 IsEmpty]: Start isEmpty. Operand 1149 states and 2088 transitions. [2021-08-06 20:00:42,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:00:42,522 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:00:42,522 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:00:42,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2021-08-06 20:00:42,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:00:42,723 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:00:42,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:00:42,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1275391376, now seen corresponding path program 122 times [2021-08-06 20:00:42,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:00:42,723 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987089332] [2021-08-06 20:00:42,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:00:42,723 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:00:42,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:00:42,786 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 70.4 percent of original size [2021-08-06 20:00:42,788 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 70.4 percent of original size [2021-08-06 20:00:42,828 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 171, result has 8.1 percent of original size [2021-08-06 20:00:42,832 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 171, result has 8.1 percent of original size [2021-08-06 20:00:42,851 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 171, result has 6.0 percent of original size [2021-08-06 20:00:42,854 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 171, result has 6.0 percent of original size [2021-08-06 20:00:42,870 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 180, result has 5.8 percent of original size [2021-08-06 20:00:42,873 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 180, result has 5.8 percent of original size [2021-08-06 20:00:42,889 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 62.5 percent of original size [2021-08-06 20:00:42,891 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 62.5 percent of original size [2021-08-06 20:00:42,907 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 20:00:42,908 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 20:00:42,929 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:00:42,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:00:42,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987089332] [2021-08-06 20:00:42,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987089332] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:00:42,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13879379] [2021-08-06 20:00:42,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:00:42,930 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:00:42,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:00:42,933 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:00:42,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2021-08-06 20:00:48,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:00:48,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:00:48,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 20:00:48,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:00:49,307 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 73.3 percent of original size [2021-08-06 20:00:49,311 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 73.3 percent of original size [2021-08-06 20:00:49,865 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:00:49,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13879379] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:00:49,865 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:00:49,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 20:00:49,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088368485] [2021-08-06 20:00:49,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 20:00:49,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:00:49,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 20:00:49,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-08-06 20:00:49,866 INFO L87 Difference]: Start difference. First operand 1149 states and 2088 transitions. Second operand has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:00:50,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:00:50,540 INFO L93 Difference]: Finished difference Result 1357 states and 2412 transitions. [2021-08-06 20:00:50,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 20:00:50,541 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:00:50,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:00:50,542 INFO L225 Difference]: With dead ends: 1357 [2021-08-06 20:00:50,542 INFO L226 Difference]: Without dead ends: 1342 [2021-08-06 20:00:50,542 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 824.2ms TimeCoverageRelationStatistics Valid=324, Invalid=1316, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 20:00:50,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1342 states. [2021-08-06 20:00:50,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1342 to 1153. [2021-08-06 20:00:50,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1153 states, 1152 states have (on average 1.8203125) internal successors, (2097), 1152 states have internal predecessors, (2097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:00:50,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1153 states to 1153 states and 2097 transitions. [2021-08-06 20:00:50,552 INFO L78 Accepts]: Start accepts. Automaton has 1153 states and 2097 transitions. Word has length 30 [2021-08-06 20:00:50,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:00:50,553 INFO L470 AbstractCegarLoop]: Abstraction has 1153 states and 2097 transitions. [2021-08-06 20:00:50,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:00:50,553 INFO L276 IsEmpty]: Start isEmpty. Operand 1153 states and 2097 transitions. [2021-08-06 20:00:50,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 20:00:50,554 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:00:50,554 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:00:50,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2021-08-06 20:00:50,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable131 [2021-08-06 20:00:50,754 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:00:50,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:00:50,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1688155938, now seen corresponding path program 123 times [2021-08-06 20:00:50,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:00:50,755 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743239547] [2021-08-06 20:00:50,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:00:50,755 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:00:50,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:00:50,820 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 70.4 percent of original size [2021-08-06 20:00:50,822 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 70.4 percent of original size [2021-08-06 20:00:50,869 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 476, result has 11.4 percent of original size [2021-08-06 20:00:50,883 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 476, result has 11.4 percent of original size [2021-08-06 20:00:50,949 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1048, result has 1.4 percent of original size [2021-08-06 20:00:50,959 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1048, result has 1.4 percent of original size [2021-08-06 20:00:50,979 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 753, result has 2.0 percent of original size [2021-08-06 20:00:51,037 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 753, result has 2.0 percent of original size [2021-08-06 20:00:51,056 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 753, result has 1.4 percent of original size [2021-08-06 20:00:51,059 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 753, result has 1.4 percent of original size [2021-08-06 20:00:51,073 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 97, result has 3.0 percent of original size [2021-08-06 20:00:51,074 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 97, result has 3.0 percent of original size [2021-08-06 20:00:51,082 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 20:00:51,083 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 20:00:51,103 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:00:51,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:00:51,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743239547] [2021-08-06 20:00:51,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743239547] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:00:51,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867164638] [2021-08-06 20:00:51,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:00:51,104 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:00:51,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:00:51,105 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:00:51,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2021-08-06 20:00:57,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-08-06 20:00:57,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:00:57,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 20:00:57,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:00:57,757 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 76.1 percent of original size [2021-08-06 20:00:57,762 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 76.1 percent of original size [2021-08-06 20:00:58,076 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:00:58,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867164638] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:00:58,076 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:00:58,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-06 20:00:58,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34323604] [2021-08-06 20:00:58,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:00:58,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:00:58,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:00:58,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:00:58,077 INFO L87 Difference]: Start difference. First operand 1153 states and 2097 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:00:58,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:00:58,631 INFO L93 Difference]: Finished difference Result 1308 states and 2325 transitions. [2021-08-06 20:00:58,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 20:00:58,632 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-06 20:00:58,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:00:58,633 INFO L225 Difference]: With dead ends: 1308 [2021-08-06 20:00:58,633 INFO L226 Difference]: Without dead ends: 1289 [2021-08-06 20:00:58,633 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 723.8ms TimeCoverageRelationStatistics Valid=232, Invalid=1250, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 20:00:58,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1289 states. [2021-08-06 20:00:58,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1289 to 1149. [2021-08-06 20:00:58,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1149 states, 1148 states have (on average 1.818815331010453) internal successors, (2088), 1148 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:00:58,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1149 states to 1149 states and 2088 transitions. [2021-08-06 20:00:58,647 INFO L78 Accepts]: Start accepts. Automaton has 1149 states and 2088 transitions. Word has length 32 [2021-08-06 20:00:58,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:00:58,647 INFO L470 AbstractCegarLoop]: Abstraction has 1149 states and 2088 transitions. [2021-08-06 20:00:58,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:00:58,647 INFO L276 IsEmpty]: Start isEmpty. Operand 1149 states and 2088 transitions. [2021-08-06 20:00:58,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 20:00:58,648 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:00:58,648 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:00:58,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2021-08-06 20:00:58,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:00:58,874 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:00:58,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:00:58,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1500465638, now seen corresponding path program 124 times [2021-08-06 20:00:58,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:00:58,874 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10108427] [2021-08-06 20:00:58,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:00:58,875 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:00:58,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:00:59,000 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 70.4 percent of original size [2021-08-06 20:00:59,002 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 70.4 percent of original size [2021-08-06 20:00:59,050 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 476, result has 11.4 percent of original size [2021-08-06 20:00:59,065 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 476, result has 11.4 percent of original size [2021-08-06 20:00:59,109 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1048, result has 1.4 percent of original size [2021-08-06 20:00:59,116 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1048, result has 1.4 percent of original size [2021-08-06 20:00:59,134 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 753, result has 2.0 percent of original size [2021-08-06 20:00:59,137 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 753, result has 2.0 percent of original size [2021-08-06 20:00:59,156 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 753, result has 1.4 percent of original size [2021-08-06 20:00:59,159 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 753, result has 1.4 percent of original size [2021-08-06 20:00:59,177 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1294, result has 0.8 percent of original size [2021-08-06 20:00:59,187 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1294, result has 0.8 percent of original size [2021-08-06 20:00:59,203 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 20:00:59,204 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 20:00:59,223 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:00:59,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:00:59,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10108427] [2021-08-06 20:00:59,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10108427] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:00:59,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876376643] [2021-08-06 20:00:59,224 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:00:59,224 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:00:59,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:00:59,224 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:00:59,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2021-08-06 20:01:05,315 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:01:05,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:01:05,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 20:01:05,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:01:06,025 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 76.1 percent of original size [2021-08-06 20:01:06,030 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 76.1 percent of original size [2021-08-06 20:01:06,454 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:01:06,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876376643] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:06,454 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:01:06,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-06 20:01:06,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935281711] [2021-08-06 20:01:06,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:01:06,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:01:06,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:01:06,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:01:06,455 INFO L87 Difference]: Start difference. First operand 1149 states and 2088 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:07,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:01:07,011 INFO L93 Difference]: Finished difference Result 1288 states and 2299 transitions. [2021-08-06 20:01:07,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 20:01:07,011 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-06 20:01:07,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:01:07,013 INFO L225 Difference]: With dead ends: 1288 [2021-08-06 20:01:07,013 INFO L226 Difference]: Without dead ends: 1273 [2021-08-06 20:01:07,013 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 788.6ms TimeCoverageRelationStatistics Valid=269, Invalid=1291, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 20:01:07,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1273 states. [2021-08-06 20:01:07,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1273 to 1152. [2021-08-06 20:01:07,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1152 states, 1151 states have (on average 1.8166811468288444) internal successors, (2091), 1151 states have internal predecessors, (2091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:07,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 2091 transitions. [2021-08-06 20:01:07,023 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 2091 transitions. Word has length 32 [2021-08-06 20:01:07,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:01:07,023 INFO L470 AbstractCegarLoop]: Abstraction has 1152 states and 2091 transitions. [2021-08-06 20:01:07,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:07,023 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 2091 transitions. [2021-08-06 20:01:07,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 20:01:07,024 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:01:07,024 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:01:07,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2021-08-06 20:01:07,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:01:07,224 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:01:07,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:01:07,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1838803174, now seen corresponding path program 125 times [2021-08-06 20:01:07,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:01:07,225 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827610127] [2021-08-06 20:01:07,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:01:07,225 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:01:07,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:01:07,301 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9660, result has 0.3 percent of original size [2021-08-06 20:01:07,324 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9660, result has 0.3 percent of original size [2021-08-06 20:01:07,352 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 38747, result has 0.1 percent of original size [2021-08-06 20:01:07,368 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 38747, result has 0.1 percent of original size [2021-08-06 20:01:07,395 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 72379, result has 0.0 percent of original size [2021-08-06 20:01:07,410 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 72379, result has 0.0 percent of original size [2021-08-06 20:01:07,445 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 72389, result has 0.0 percent of original size [2021-08-06 20:01:07,464 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 72389, result has 0.0 percent of original size [2021-08-06 20:01:07,486 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 72389, result has 0.0 percent of original size [2021-08-06 20:01:07,494 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 72389, result has 0.0 percent of original size [2021-08-06 20:01:07,522 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6360, result has 0.2 percent of original size [2021-08-06 20:01:07,550 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6360, result has 0.2 percent of original size [2021-08-06 20:01:07,565 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 40.7 percent of original size [2021-08-06 20:01:07,566 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 40.7 percent of original size [2021-08-06 20:01:07,582 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 20:01:07,582 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 20:01:07,602 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:01:07,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:01:07,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827610127] [2021-08-06 20:01:07,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827610127] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:07,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527623103] [2021-08-06 20:01:07,603 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:01:07,603 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:01:07,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:01:07,603 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:01:07,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2021-08-06 20:01:13,856 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-06 20:01:13,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:01:13,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 20:01:13,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:01:14,384 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 73.3 percent of original size [2021-08-06 20:01:14,388 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 73.3 percent of original size [2021-08-06 20:01:14,983 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:01:14,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527623103] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:14,983 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:01:14,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-06 20:01:14,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581445471] [2021-08-06 20:01:14,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:01:14,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:01:14,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:01:14,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:01:14,984 INFO L87 Difference]: Start difference. First operand 1152 states and 2091 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:15,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:01:15,613 INFO L93 Difference]: Finished difference Result 1369 states and 2421 transitions. [2021-08-06 20:01:15,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 20:01:15,613 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-06 20:01:15,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:01:15,615 INFO L225 Difference]: With dead ends: 1369 [2021-08-06 20:01:15,615 INFO L226 Difference]: Without dead ends: 1358 [2021-08-06 20:01:15,615 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 813.6ms TimeCoverageRelationStatistics Valid=271, Invalid=1369, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 20:01:15,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1358 states. [2021-08-06 20:01:15,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1358 to 1160. [2021-08-06 20:01:15,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1160 states, 1159 states have (on average 1.815358067299396) internal successors, (2104), 1159 states have internal predecessors, (2104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:15,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 2104 transitions. [2021-08-06 20:01:15,625 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 2104 transitions. Word has length 32 [2021-08-06 20:01:15,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:01:15,625 INFO L470 AbstractCegarLoop]: Abstraction has 1160 states and 2104 transitions. [2021-08-06 20:01:15,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:15,625 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 2104 transitions. [2021-08-06 20:01:15,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 20:01:15,626 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:01:15,626 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:01:15,660 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2021-08-06 20:01:15,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-08-06 20:01:15,826 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:01:15,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:01:15,827 INFO L82 PathProgramCache]: Analyzing trace with hash -2044741606, now seen corresponding path program 126 times [2021-08-06 20:01:15,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:01:15,827 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796301070] [2021-08-06 20:01:15,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:01:15,827 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:01:15,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:01:15,961 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3301, result has 0.5 percent of original size [2021-08-06 20:01:15,977 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3301, result has 0.5 percent of original size [2021-08-06 20:01:16,008 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 34033, result has 0.1 percent of original size [2021-08-06 20:01:16,039 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 34033, result has 0.1 percent of original size [2021-08-06 20:01:16,079 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27935, result has 0.1 percent of original size [2021-08-06 20:01:16,119 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27935, result has 0.1 percent of original size [2021-08-06 20:01:16,151 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6297, result has 0.2 percent of original size [2021-08-06 20:01:16,161 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6297, result has 0.2 percent of original size [2021-08-06 20:01:16,180 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6297, result has 0.2 percent of original size [2021-08-06 20:01:16,187 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6297, result has 0.2 percent of original size [2021-08-06 20:01:16,206 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6295, result has 0.2 percent of original size [2021-08-06 20:01:16,216 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6295, result has 0.2 percent of original size [2021-08-06 20:01:16,231 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 40.7 percent of original size [2021-08-06 20:01:16,232 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 40.7 percent of original size [2021-08-06 20:01:16,247 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 20:01:16,248 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 20:01:16,267 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:01:16,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:01:16,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796301070] [2021-08-06 20:01:16,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796301070] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:16,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596922228] [2021-08-06 20:01:16,268 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:01:16,268 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:01:16,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:01:16,269 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:01:16,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2021-08-06 20:01:22,514 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-06 20:01:22,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:01:22,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 20:01:22,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:01:23,022 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 73.3 percent of original size [2021-08-06 20:01:23,026 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 73.3 percent of original size [2021-08-06 20:01:23,556 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:01:23,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596922228] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:23,556 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:01:23,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-06 20:01:23,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799495074] [2021-08-06 20:01:23,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:01:23,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:01:23,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:01:23,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:01:23,557 INFO L87 Difference]: Start difference. First operand 1160 states and 2104 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:24,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:01:24,358 INFO L93 Difference]: Finished difference Result 1398 states and 2476 transitions. [2021-08-06 20:01:24,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 20:01:24,358 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-06 20:01:24,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:01:24,360 INFO L225 Difference]: With dead ends: 1398 [2021-08-06 20:01:24,360 INFO L226 Difference]: Without dead ends: 1383 [2021-08-06 20:01:24,360 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 957.0ms TimeCoverageRelationStatistics Valid=345, Invalid=1635, Unknown=0, NotChecked=0, Total=1980 [2021-08-06 20:01:24,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1383 states. [2021-08-06 20:01:24,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1383 to 1158. [2021-08-06 20:01:24,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1158 states, 1157 states have (on average 1.815038893690579) internal successors, (2100), 1157 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:24,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1158 states to 1158 states and 2100 transitions. [2021-08-06 20:01:24,373 INFO L78 Accepts]: Start accepts. Automaton has 1158 states and 2100 transitions. Word has length 32 [2021-08-06 20:01:24,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:01:24,373 INFO L470 AbstractCegarLoop]: Abstraction has 1158 states and 2100 transitions. [2021-08-06 20:01:24,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:24,373 INFO L276 IsEmpty]: Start isEmpty. Operand 1158 states and 2100 transitions. [2021-08-06 20:01:24,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 20:01:24,374 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:01:24,374 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:01:24,409 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0 [2021-08-06 20:01:24,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-08-06 20:01:24,575 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:01:24,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:01:24,575 INFO L82 PathProgramCache]: Analyzing trace with hash -2028737570, now seen corresponding path program 127 times [2021-08-06 20:01:24,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:01:24,575 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349858559] [2021-08-06 20:01:24,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:01:24,575 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:01:24,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:01:24,639 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 57.6 percent of original size [2021-08-06 20:01:24,641 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 57.6 percent of original size [2021-08-06 20:01:24,659 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:01:24,661 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:01:24,680 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1879, result has 0.8 percent of original size [2021-08-06 20:01:24,688 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1879, result has 0.8 percent of original size [2021-08-06 20:01:24,714 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1810, result has 4.2 percent of original size [2021-08-06 20:01:24,736 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1810, result has 4.2 percent of original size [2021-08-06 20:01:24,784 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3404, result has 1.3 percent of original size [2021-08-06 20:01:24,807 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3404, result has 1.3 percent of original size [2021-08-06 20:01:24,838 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1924, result has 2.3 percent of original size [2021-08-06 20:01:24,855 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1924, result has 2.3 percent of original size [2021-08-06 20:01:24,884 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 45, result has 19.6 percent of original size [2021-08-06 20:01:24,885 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 45, result has 19.6 percent of original size [2021-08-06 20:01:24,902 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 20:01:24,902 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 20:01:24,922 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:01:24,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:01:24,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349858559] [2021-08-06 20:01:24,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349858559] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:24,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734717390] [2021-08-06 20:01:24,923 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:01:24,923 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:01:24,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:01:24,924 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:01:24,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2021-08-06 20:01:31,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:01:31,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 20:01:31,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:01:31,708 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 73.3 percent of original size [2021-08-06 20:01:31,712 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 73.3 percent of original size [2021-08-06 20:01:32,311 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:01:32,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734717390] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:32,311 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:01:32,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-06 20:01:32,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457279473] [2021-08-06 20:01:32,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:01:32,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:01:32,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:01:32,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:01:32,312 INFO L87 Difference]: Start difference. First operand 1158 states and 2100 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:32,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:01:32,967 INFO L93 Difference]: Finished difference Result 1497 states and 2635 transitions. [2021-08-06 20:01:32,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 20:01:32,968 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-06 20:01:32,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:01:32,969 INFO L225 Difference]: With dead ends: 1497 [2021-08-06 20:01:32,969 INFO L226 Difference]: Without dead ends: 1478 [2021-08-06 20:01:32,970 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 820.7ms TimeCoverageRelationStatistics Valid=342, Invalid=1638, Unknown=0, NotChecked=0, Total=1980 [2021-08-06 20:01:32,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1478 states. [2021-08-06 20:01:32,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1478 to 1170. [2021-08-06 20:01:32,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1170 states, 1169 states have (on average 1.8195038494439693) internal successors, (2127), 1169 states have internal predecessors, (2127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:32,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1170 states to 1170 states and 2127 transitions. [2021-08-06 20:01:32,980 INFO L78 Accepts]: Start accepts. Automaton has 1170 states and 2127 transitions. Word has length 32 [2021-08-06 20:01:32,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:01:32,981 INFO L470 AbstractCegarLoop]: Abstraction has 1170 states and 2127 transitions. [2021-08-06 20:01:32,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:32,981 INFO L276 IsEmpty]: Start isEmpty. Operand 1170 states and 2127 transitions. [2021-08-06 20:01:32,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 20:01:32,982 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:01:32,982 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:01:33,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Forceful destruction successful, exit code 0 [2021-08-06 20:01:33,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-08-06 20:01:33,182 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:01:33,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:01:33,182 INFO L82 PathProgramCache]: Analyzing trace with hash -581908906, now seen corresponding path program 128 times [2021-08-06 20:01:33,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:01:33,183 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117939328] [2021-08-06 20:01:33,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:01:33,183 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:01:33,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:01:33,255 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 57.6 percent of original size [2021-08-06 20:01:33,257 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 57.6 percent of original size [2021-08-06 20:01:33,275 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:01:33,277 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:01:33,293 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 440, result has 3.3 percent of original size [2021-08-06 20:01:33,297 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 440, result has 3.3 percent of original size [2021-08-06 20:01:33,315 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 416, result has 7.8 percent of original size [2021-08-06 20:01:33,320 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 416, result has 7.8 percent of original size [2021-08-06 20:01:33,405 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 783, result has 2.7 percent of original size [2021-08-06 20:01:33,417 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 783, result has 2.7 percent of original size [2021-08-06 20:01:33,437 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 622, result has 1.7 percent of original size [2021-08-06 20:01:33,445 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 622, result has 1.7 percent of original size [2021-08-06 20:01:33,460 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 20:01:33,461 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 20:01:33,469 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 20:01:33,469 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 20:01:33,492 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:01:33,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:01:33,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117939328] [2021-08-06 20:01:33,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117939328] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:33,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805021211] [2021-08-06 20:01:33,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:01:33,492 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:01:33,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:01:33,493 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:01:33,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2021-08-06 20:01:39,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:01:39,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:01:39,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 20:01:39,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:01:40,292 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 73.3 percent of original size [2021-08-06 20:01:40,296 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 73.3 percent of original size [2021-08-06 20:01:41,045 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:01:41,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805021211] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:41,045 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:01:41,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-06 20:01:41,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364932881] [2021-08-06 20:01:41,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:01:41,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:01:41,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:01:41,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:01:41,046 INFO L87 Difference]: Start difference. First operand 1170 states and 2127 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:41,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:01:41,600 INFO L93 Difference]: Finished difference Result 1382 states and 2450 transitions. [2021-08-06 20:01:41,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 20:01:41,600 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-06 20:01:41,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:01:41,602 INFO L225 Difference]: With dead ends: 1382 [2021-08-06 20:01:41,602 INFO L226 Difference]: Without dead ends: 1371 [2021-08-06 20:01:41,602 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 742.5ms TimeCoverageRelationStatistics Valid=241, Invalid=1399, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 20:01:41,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2021-08-06 20:01:41,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1170. [2021-08-06 20:01:41,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1170 states, 1169 states have (on average 1.8152266894781866) internal successors, (2122), 1169 states have internal predecessors, (2122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:41,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1170 states to 1170 states and 2122 transitions. [2021-08-06 20:01:41,612 INFO L78 Accepts]: Start accepts. Automaton has 1170 states and 2122 transitions. Word has length 32 [2021-08-06 20:01:41,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:01:41,613 INFO L470 AbstractCegarLoop]: Abstraction has 1170 states and 2122 transitions. [2021-08-06 20:01:41,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:41,613 INFO L276 IsEmpty]: Start isEmpty. Operand 1170 states and 2122 transitions. [2021-08-06 20:01:41,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 20:01:41,614 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:01:41,614 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:01:41,649 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2021-08-06 20:01:41,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:01:41,814 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:01:41,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:01:41,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1107936742, now seen corresponding path program 129 times [2021-08-06 20:01:41,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:01:41,815 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827931856] [2021-08-06 20:01:41,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:01:41,815 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:01:41,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:01:41,888 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 70.4 percent of original size [2021-08-06 20:01:41,890 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 70.4 percent of original size [2021-08-06 20:01:41,931 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1350, result has 4.3 percent of original size [2021-08-06 20:01:41,942 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1350, result has 4.3 percent of original size [2021-08-06 20:01:41,981 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1350, result has 4.1 percent of original size [2021-08-06 20:01:41,992 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1350, result has 4.1 percent of original size [2021-08-06 20:01:42,027 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 2485, result has 2.4 percent of original size [2021-08-06 20:01:42,039 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 2485, result has 2.4 percent of original size [2021-08-06 20:01:42,135 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1431, result has 0.8 percent of original size [2021-08-06 20:01:42,141 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1431, result has 0.8 percent of original size [2021-08-06 20:01:42,172 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 2333, result has 0.5 percent of original size [2021-08-06 20:01:42,205 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 2333, result has 0.5 percent of original size [2021-08-06 20:01:42,220 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 20:01:42,221 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 20:01:42,240 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:01:42,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:01:42,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827931856] [2021-08-06 20:01:42,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827931856] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:42,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994809769] [2021-08-06 20:01:42,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:01:42,241 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:01:42,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:01:42,242 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:01:42,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2021-08-06 20:01:48,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-06 20:01:48,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:01:48,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 20:01:48,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:01:49,130 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 73.3 percent of original size [2021-08-06 20:01:49,134 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 73.3 percent of original size [2021-08-06 20:01:49,824 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:01:49,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994809769] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:49,824 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:01:49,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-06 20:01:49,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200454728] [2021-08-06 20:01:49,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:01:49,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:01:49,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:01:49,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:01:49,825 INFO L87 Difference]: Start difference. First operand 1170 states and 2122 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:50,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:01:50,552 INFO L93 Difference]: Finished difference Result 1352 states and 2394 transitions. [2021-08-06 20:01:50,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 20:01:50,553 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-06 20:01:50,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:01:50,554 INFO L225 Difference]: With dead ends: 1352 [2021-08-06 20:01:50,554 INFO L226 Difference]: Without dead ends: 1337 [2021-08-06 20:01:50,554 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 926.3ms TimeCoverageRelationStatistics Valid=316, Invalid=1406, Unknown=0, NotChecked=0, Total=1722 [2021-08-06 20:01:50,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1337 states. [2021-08-06 20:01:50,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1337 to 1177. [2021-08-06 20:01:50,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1177 states, 1176 states have (on average 1.8180272108843538) internal successors, (2138), 1176 states have internal predecessors, (2138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:50,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1177 states to 1177 states and 2138 transitions. [2021-08-06 20:01:50,568 INFO L78 Accepts]: Start accepts. Automaton has 1177 states and 2138 transitions. Word has length 32 [2021-08-06 20:01:50,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:01:50,568 INFO L470 AbstractCegarLoop]: Abstraction has 1177 states and 2138 transitions. [2021-08-06 20:01:50,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:50,568 INFO L276 IsEmpty]: Start isEmpty. Operand 1177 states and 2138 transitions. [2021-08-06 20:01:50,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 20:01:50,570 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:01:50,570 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:01:50,616 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2021-08-06 20:01:50,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-08-06 20:01:50,785 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:01:50,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:01:50,785 INFO L82 PathProgramCache]: Analyzing trace with hash 810523290, now seen corresponding path program 130 times [2021-08-06 20:01:50,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:01:50,785 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569174532] [2021-08-06 20:01:50,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:01:50,785 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:01:50,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:01:50,847 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 57.6 percent of original size [2021-08-06 20:01:50,849 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 57.6 percent of original size [2021-08-06 20:01:50,867 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:01:50,868 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:01:50,885 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 362, result has 4.0 percent of original size [2021-08-06 20:01:50,888 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 362, result has 4.0 percent of original size [2021-08-06 20:01:50,907 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 344, result has 7.8 percent of original size [2021-08-06 20:01:50,912 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 344, result has 7.8 percent of original size [2021-08-06 20:01:50,941 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1375, result has 4.4 percent of original size [2021-08-06 20:01:50,958 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1375, result has 4.4 percent of original size [2021-08-06 20:01:51,055 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 707, result has 1.5 percent of original size [2021-08-06 20:01:51,064 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 707, result has 1.5 percent of original size [2021-08-06 20:01:51,089 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1136, result has 1.0 percent of original size [2021-08-06 20:01:51,109 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1136, result has 1.0 percent of original size [2021-08-06 20:01:51,125 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 20:01:51,126 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 20:01:51,150 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:01:51,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:01:51,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569174532] [2021-08-06 20:01:51,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569174532] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:51,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104838645] [2021-08-06 20:01:51,150 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:01:51,150 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:01:51,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:01:51,151 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:01:51,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2021-08-06 20:01:57,680 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:01:57,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:01:57,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 20:01:57,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:01:58,063 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 73.3 percent of original size [2021-08-06 20:01:58,067 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 73.3 percent of original size [2021-08-06 20:01:59,038 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:01:59,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104838645] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:59,039 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:01:59,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-06 20:01:59,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073257562] [2021-08-06 20:01:59,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:01:59,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:01:59,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:01:59,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:01:59,039 INFO L87 Difference]: Start difference. First operand 1177 states and 2138 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:02:00,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:02:00,017 INFO L93 Difference]: Finished difference Result 1421 states and 2516 transitions. [2021-08-06 20:02:00,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 20:02:00,017 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-06 20:02:00,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:02:00,019 INFO L225 Difference]: With dead ends: 1421 [2021-08-06 20:02:00,019 INFO L226 Difference]: Without dead ends: 1402 [2021-08-06 20:02:00,019 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 1231.3ms TimeCoverageRelationStatistics Valid=324, Invalid=1482, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 20:02:00,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1402 states. [2021-08-06 20:02:00,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1402 to 1186. [2021-08-06 20:02:00,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1186 states, 1185 states have (on average 1.8168776371308017) internal successors, (2153), 1185 states have internal predecessors, (2153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:02:00,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1186 states to 1186 states and 2153 transitions. [2021-08-06 20:02:00,030 INFO L78 Accepts]: Start accepts. Automaton has 1186 states and 2153 transitions. Word has length 32 [2021-08-06 20:02:00,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:02:00,030 INFO L470 AbstractCegarLoop]: Abstraction has 1186 states and 2153 transitions. [2021-08-06 20:02:00,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:02:00,030 INFO L276 IsEmpty]: Start isEmpty. Operand 1186 states and 2153 transitions. [2021-08-06 20:02:00,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 20:02:00,031 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:02:00,031 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:02:00,067 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Ended with exit code 0 [2021-08-06 20:02:00,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-08-06 20:02:00,232 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:02:00,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:02:00,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1126184874, now seen corresponding path program 131 times [2021-08-06 20:02:00,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:02:00,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648972827] [2021-08-06 20:02:00,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:02:00,232 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:02:00,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:02:00,322 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 57.6 percent of original size [2021-08-06 20:02:00,324 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 57.6 percent of original size [2021-08-06 20:02:00,342 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:02:00,344 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:02:00,359 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 44.1 percent of original size [2021-08-06 20:02:00,361 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 44.1 percent of original size [2021-08-06 20:02:00,379 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 73.3 percent of original size [2021-08-06 20:02:00,381 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 73.3 percent of original size [2021-08-06 20:02:00,403 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 255, result has 21.3 percent of original size [2021-08-06 20:02:00,413 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 255, result has 21.3 percent of original size [2021-08-06 20:02:00,471 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 589, result has 1.8 percent of original size [2021-08-06 20:02:00,475 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 589, result has 1.8 percent of original size [2021-08-06 20:02:00,491 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 880, result has 0.3 percent of original size [2021-08-06 20:02:00,496 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 880, result has 0.3 percent of original size [2021-08-06 20:02:00,504 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 20:02:00,505 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 20:02:00,525 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:02:00,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:02:00,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648972827] [2021-08-06 20:02:00,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648972827] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:02:00,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842346750] [2021-08-06 20:02:00,525 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:02:00,525 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:02:00,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:02:00,526 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:02:00,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2021-08-06 20:02:07,199 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-06 20:02:07,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:02:07,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 20:02:07,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:02:07,598 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 73.3 percent of original size [2021-08-06 20:02:07,602 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 73.3 percent of original size [2021-08-06 20:02:08,350 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:02:08,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842346750] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:02:08,350 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:02:08,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-06 20:02:08,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831289050] [2021-08-06 20:02:08,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:02:08,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:02:08,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:02:08,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:02:08,351 INFO L87 Difference]: Start difference. First operand 1186 states and 2153 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:02:08,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:02:08,911 INFO L93 Difference]: Finished difference Result 1390 states and 2463 transitions. [2021-08-06 20:02:08,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 20:02:08,911 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-06 20:02:08,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:02:08,913 INFO L225 Difference]: With dead ends: 1390 [2021-08-06 20:02:08,913 INFO L226 Difference]: Without dead ends: 1371 [2021-08-06 20:02:08,913 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 768.2ms TimeCoverageRelationStatistics Valid=241, Invalid=1399, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 20:02:08,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2021-08-06 20:02:08,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1194. [2021-08-06 20:02:08,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1194 states, 1193 states have (on average 1.8155909471919531) internal successors, (2166), 1193 states have internal predecessors, (2166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:02:08,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1194 states to 1194 states and 2166 transitions. [2021-08-06 20:02:08,925 INFO L78 Accepts]: Start accepts. Automaton has 1194 states and 2166 transitions. Word has length 32 [2021-08-06 20:02:08,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:02:08,925 INFO L470 AbstractCegarLoop]: Abstraction has 1194 states and 2166 transitions. [2021-08-06 20:02:08,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:02:08,925 INFO L276 IsEmpty]: Start isEmpty. Operand 1194 states and 2166 transitions. [2021-08-06 20:02:08,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 20:02:08,927 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:02:08,927 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:02:08,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Forceful destruction successful, exit code 0 [2021-08-06 20:02:09,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:02:09,149 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:02:09,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:02:09,149 INFO L82 PathProgramCache]: Analyzing trace with hash -938494574, now seen corresponding path program 132 times [2021-08-06 20:02:09,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:02:09,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054120087] [2021-08-06 20:02:09,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:02:09,149 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:02:09,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:02:09,217 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 57.6 percent of original size [2021-08-06 20:02:09,219 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 57.6 percent of original size [2021-08-06 20:02:09,237 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:02:09,239 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:02:09,256 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 299, result has 4.8 percent of original size [2021-08-06 20:02:09,260 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 299, result has 4.8 percent of original size [2021-08-06 20:02:09,278 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 273, result has 11.9 percent of original size [2021-08-06 20:02:09,284 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 273, result has 11.9 percent of original size [2021-08-06 20:02:09,311 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 365, result has 11.4 percent of original size [2021-08-06 20:02:09,319 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 365, result has 11.4 percent of original size [2021-08-06 20:02:09,357 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 378, result has 2.8 percent of original size [2021-08-06 20:02:09,359 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 378, result has 2.8 percent of original size [2021-08-06 20:02:09,379 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 647, result has 1.7 percent of original size [2021-08-06 20:02:09,384 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 647, result has 1.7 percent of original size [2021-08-06 20:02:09,401 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 20:02:09,401 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 20:02:09,421 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:02:09,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:02:09,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054120087] [2021-08-06 20:02:09,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054120087] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:02:09,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989270449] [2021-08-06 20:02:09,421 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:02:09,421 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:02:09,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:02:09,422 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:02:09,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2021-08-06 20:02:16,154 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 20:02:16,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:02:16,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 20:02:16,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:02:16,568 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 73.3 percent of original size [2021-08-06 20:02:16,572 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 73.3 percent of original size [2021-08-06 20:02:17,470 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:02:17,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989270449] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:02:17,470 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:02:17,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-06 20:02:17,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792715021] [2021-08-06 20:02:17,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:02:17,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:02:17,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:02:17,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:02:17,471 INFO L87 Difference]: Start difference. First operand 1194 states and 2166 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:02:18,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:02:18,224 INFO L93 Difference]: Finished difference Result 1393 states and 2480 transitions. [2021-08-06 20:02:18,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 20:02:18,224 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-06 20:02:18,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:02:18,226 INFO L225 Difference]: With dead ends: 1393 [2021-08-06 20:02:18,226 INFO L226 Difference]: Without dead ends: 1378 [2021-08-06 20:02:18,226 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 940.4ms TimeCoverageRelationStatistics Valid=319, Invalid=1573, Unknown=0, NotChecked=0, Total=1892 [2021-08-06 20:02:18,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1378 states. [2021-08-06 20:02:18,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1378 to 1202. [2021-08-06 20:02:18,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1202 states, 1201 states have (on average 1.8143213988343048) internal successors, (2179), 1201 states have internal predecessors, (2179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:02:18,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1202 states to 1202 states and 2179 transitions. [2021-08-06 20:02:18,236 INFO L78 Accepts]: Start accepts. Automaton has 1202 states and 2179 transitions. Word has length 32 [2021-08-06 20:02:18,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:02:18,237 INFO L470 AbstractCegarLoop]: Abstraction has 1202 states and 2179 transitions. [2021-08-06 20:02:18,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:02:18,237 INFO L276 IsEmpty]: Start isEmpty. Operand 1202 states and 2179 transitions. [2021-08-06 20:02:18,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 20:02:18,238 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:02:18,238 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:02:18,274 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Ended with exit code 0 [2021-08-06 20:02:18,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:02:18,438 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:02:18,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:02:18,439 INFO L82 PathProgramCache]: Analyzing trace with hash -682570530, now seen corresponding path program 133 times [2021-08-06 20:02:18,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:02:18,439 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559071222] [2021-08-06 20:02:18,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:02:18,439 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:02:18,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:02:18,507 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 78.6 percent of original size [2021-08-06 20:02:18,509 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 78.6 percent of original size [2021-08-06 20:02:18,533 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 71.4 percent of original size [2021-08-06 20:02:18,536 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 71.4 percent of original size [2021-08-06 20:02:18,585 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 220, result has 17.9 percent of original size [2021-08-06 20:02:18,591 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 220, result has 17.9 percent of original size [2021-08-06 20:02:18,626 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 783, result has 2.7 percent of original size [2021-08-06 20:02:18,638 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 783, result has 2.7 percent of original size [2021-08-06 20:02:18,660 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1259, result has 1.7 percent of original size [2021-08-06 20:02:18,671 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1259, result has 1.7 percent of original size [2021-08-06 20:02:18,695 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1029, result has 1.1 percent of original size [2021-08-06 20:02:18,707 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1029, result has 1.1 percent of original size [2021-08-06 20:02:18,723 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 20:02:18,723 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 20:02:18,744 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:02:18,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:02:18,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559071222] [2021-08-06 20:02:18,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559071222] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:02:18,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618824234] [2021-08-06 20:02:18,745 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:02:18,745 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:02:18,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:02:18,745 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:02:18,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2021-08-06 20:02:25,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:02:25,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 20:02:25,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:02:25,886 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 20:02:25,890 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 20:02:26,525 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:02:26,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618824234] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:02:26,526 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:02:26,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-06 20:02:26,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593952979] [2021-08-06 20:02:26,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:02:26,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:02:26,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:02:26,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:02:26,526 INFO L87 Difference]: Start difference. First operand 1202 states and 2179 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:02:27,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:02:27,056 INFO L93 Difference]: Finished difference Result 1450 states and 2564 transitions. [2021-08-06 20:02:27,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 20:02:27,056 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-06 20:02:27,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:02:27,058 INFO L225 Difference]: With dead ends: 1450 [2021-08-06 20:02:27,058 INFO L226 Difference]: Without dead ends: 1435 [2021-08-06 20:02:27,058 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 692.7ms TimeCoverageRelationStatistics Valid=286, Invalid=1274, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 20:02:27,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1435 states. [2021-08-06 20:02:27,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1435 to 1214. [2021-08-06 20:02:27,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1214 states, 1213 states have (on average 1.8145094806265458) internal successors, (2201), 1213 states have internal predecessors, (2201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:02:27,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1214 states to 1214 states and 2201 transitions. [2021-08-06 20:02:27,068 INFO L78 Accepts]: Start accepts. Automaton has 1214 states and 2201 transitions. Word has length 32 [2021-08-06 20:02:27,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:02:27,068 INFO L470 AbstractCegarLoop]: Abstraction has 1214 states and 2201 transitions. [2021-08-06 20:02:27,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:02:27,068 INFO L276 IsEmpty]: Start isEmpty. Operand 1214 states and 2201 transitions. [2021-08-06 20:02:27,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 20:02:27,069 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:02:27,069 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:02:27,104 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Ended with exit code 0 [2021-08-06 20:02:27,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:02:27,270 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:02:27,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:02:27,270 INFO L82 PathProgramCache]: Analyzing trace with hash 764258134, now seen corresponding path program 134 times [2021-08-06 20:02:27,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:02:27,270 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728958484] [2021-08-06 20:02:27,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:02:27,270 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:02:27,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:02:27,333 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 78.6 percent of original size [2021-08-06 20:02:27,335 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 78.6 percent of original size [2021-08-06 20:02:27,357 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 71.4 percent of original size [2021-08-06 20:02:27,359 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 71.4 percent of original size [2021-08-06 20:02:27,409 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 326, result has 11.9 percent of original size [2021-08-06 20:02:27,418 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 326, result has 11.9 percent of original size [2021-08-06 20:02:27,450 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1828, result has 0.6 percent of original size [2021-08-06 20:02:27,455 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1828, result has 0.6 percent of original size [2021-08-06 20:02:27,474 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3187, result has 0.3 percent of original size [2021-08-06 20:02:27,482 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3187, result has 0.3 percent of original size [2021-08-06 20:02:27,501 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3241, result has 0.1 percent of original size [2021-08-06 20:02:27,510 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3241, result has 0.1 percent of original size [2021-08-06 20:02:27,519 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 20:02:27,520 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 20:02:27,541 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:02:27,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:02:27,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728958484] [2021-08-06 20:02:27,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728958484] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:02:27,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760454599] [2021-08-06 20:02:27,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:02:27,541 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:02:27,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:02:27,542 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:02:27,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2021-08-06 20:02:34,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:02:34,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:02:34,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 20:02:34,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:02:34,721 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 20:02:34,724 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 20:02:35,598 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:02:35,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760454599] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:02:35,599 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:02:35,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-06 20:02:35,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074026325] [2021-08-06 20:02:35,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:02:35,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:02:35,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:02:35,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:02:35,599 INFO L87 Difference]: Start difference. First operand 1214 states and 2201 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:02:36,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:02:36,172 INFO L93 Difference]: Finished difference Result 1423 states and 2527 transitions. [2021-08-06 20:02:36,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 20:02:36,173 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-06 20:02:36,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:02:36,174 INFO L225 Difference]: With dead ends: 1423 [2021-08-06 20:02:36,174 INFO L226 Difference]: Without dead ends: 1408 [2021-08-06 20:02:36,175 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 811.1ms TimeCoverageRelationStatistics Valid=246, Invalid=1314, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 20:02:36,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1408 states. [2021-08-06 20:02:36,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1408 to 1212. [2021-08-06 20:02:36,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1212 states, 1211 states have (on average 1.8125516102394714) internal successors, (2195), 1211 states have internal predecessors, (2195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:02:36,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1212 states to 1212 states and 2195 transitions. [2021-08-06 20:02:36,185 INFO L78 Accepts]: Start accepts. Automaton has 1212 states and 2195 transitions. Word has length 32 [2021-08-06 20:02:36,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:02:36,185 INFO L470 AbstractCegarLoop]: Abstraction has 1212 states and 2195 transitions. [2021-08-06 20:02:36,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:02:36,186 INFO L276 IsEmpty]: Start isEmpty. Operand 1212 states and 2195 transitions. [2021-08-06 20:02:36,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 20:02:36,187 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:02:36,187 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:02:36,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Forceful destruction successful, exit code 0 [2021-08-06 20:02:36,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:02:36,387 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:02:36,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:02:36,387 INFO L82 PathProgramCache]: Analyzing trace with hash -2138276966, now seen corresponding path program 135 times [2021-08-06 20:02:36,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:02:36,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34751033] [2021-08-06 20:02:36,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:02:36,388 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:02:36,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:02:36,450 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 78.6 percent of original size [2021-08-06 20:02:36,452 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 78.6 percent of original size [2021-08-06 20:02:36,473 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 71.4 percent of original size [2021-08-06 20:02:36,475 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 71.4 percent of original size [2021-08-06 20:02:36,524 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 162, result has 22.9 percent of original size [2021-08-06 20:02:36,530 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 162, result has 22.9 percent of original size [2021-08-06 20:02:36,563 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 501, result has 13.2 percent of original size [2021-08-06 20:02:36,641 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 501, result has 13.2 percent of original size [2021-08-06 20:02:36,691 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 484, result has 11.2 percent of original size [2021-08-06 20:02:36,704 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 484, result has 11.2 percent of original size [2021-08-06 20:02:36,743 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 729, result has 7.7 percent of original size [2021-08-06 20:02:36,759 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 729, result has 7.7 percent of original size [2021-08-06 20:02:36,794 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 20:02:36,794 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 20:02:36,815 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:02:36,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:02:36,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34751033] [2021-08-06 20:02:36,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34751033] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:02:36,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372758499] [2021-08-06 20:02:36,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:02:36,815 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:02:36,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:02:36,816 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:02:36,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2021-08-06 20:02:43,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-06 20:02:43,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:02:43,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 20:02:43,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:02:43,824 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 91.9 percent of original size [2021-08-06 20:02:43,826 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 91.9 percent of original size [2021-08-06 20:02:43,969 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 65.2 percent of original size [2021-08-06 20:02:43,971 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 65.2 percent of original size [2021-08-06 20:02:44,853 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:02:44,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372758499] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:02:44,853 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:02:44,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-06 20:02:44,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648488210] [2021-08-06 20:02:44,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:02:44,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:02:44,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:02:44,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:02:44,854 INFO L87 Difference]: Start difference. First operand 1212 states and 2195 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:02:45,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:02:45,626 INFO L93 Difference]: Finished difference Result 1542 states and 2717 transitions. [2021-08-06 20:02:45,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 20:02:45,626 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-06 20:02:45,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:02:45,628 INFO L225 Difference]: With dead ends: 1542 [2021-08-06 20:02:45,628 INFO L226 Difference]: Without dead ends: 1531 [2021-08-06 20:02:45,628 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 958.1ms TimeCoverageRelationStatistics Valid=286, Invalid=1354, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 20:02:45,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1531 states. [2021-08-06 20:02:45,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1531 to 1230. [2021-08-06 20:02:45,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1230 states, 1229 states have (on average 1.8120423108218064) internal successors, (2227), 1229 states have internal predecessors, (2227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:02:45,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1230 states to 1230 states and 2227 transitions. [2021-08-06 20:02:45,639 INFO L78 Accepts]: Start accepts. Automaton has 1230 states and 2227 transitions. Word has length 32 [2021-08-06 20:02:45,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:02:45,639 INFO L470 AbstractCegarLoop]: Abstraction has 1230 states and 2227 transitions. [2021-08-06 20:02:45,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:02:45,639 INFO L276 IsEmpty]: Start isEmpty. Operand 1230 states and 2227 transitions. [2021-08-06 20:02:45,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 20:02:45,640 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:02:45,640 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:02:45,676 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Ended with exit code 0 [2021-08-06 20:02:45,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-08-06 20:02:45,841 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:02:45,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:02:45,841 INFO L82 PathProgramCache]: Analyzing trace with hash 425920598, now seen corresponding path program 136 times [2021-08-06 20:02:45,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:02:45,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509243888] [2021-08-06 20:02:45,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:02:45,841 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:02:45,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:02:45,916 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 78.6 percent of original size [2021-08-06 20:02:45,919 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 78.6 percent of original size [2021-08-06 20:02:45,940 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 71.4 percent of original size [2021-08-06 20:02:45,942 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 71.4 percent of original size [2021-08-06 20:02:45,990 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 162, result has 22.9 percent of original size [2021-08-06 20:02:45,996 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 162, result has 22.9 percent of original size [2021-08-06 20:02:46,030 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 501, result has 13.2 percent of original size [2021-08-06 20:02:46,043 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 501, result has 13.2 percent of original size [2021-08-06 20:02:46,094 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 484, result has 11.2 percent of original size [2021-08-06 20:02:46,107 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 484, result has 11.2 percent of original size [2021-08-06 20:02:46,141 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 20:02:46,141 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 20:02:46,150 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 20:02:46,150 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 20:02:46,171 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:02:46,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:02:46,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509243888] [2021-08-06 20:02:46,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509243888] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:02:46,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995570219] [2021-08-06 20:02:46,171 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:02:46,171 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:02:46,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:02:46,172 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:02:46,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2021-08-06 20:02:53,189 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:02:53,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:02:53,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 20:02:53,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:02:53,465 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 20:02:53,468 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 20:02:54,558 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:02:54,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995570219] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:02:54,558 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:02:54,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-06 20:02:54,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387639650] [2021-08-06 20:02:54,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:02:54,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:02:54,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:02:54,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:02:54,559 INFO L87 Difference]: Start difference. First operand 1230 states and 2227 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:02:55,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:02:55,244 INFO L93 Difference]: Finished difference Result 1558 states and 2728 transitions. [2021-08-06 20:02:55,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 20:02:55,244 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-06 20:02:55,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:02:55,245 INFO L225 Difference]: With dead ends: 1558 [2021-08-06 20:02:55,246 INFO L226 Difference]: Without dead ends: 1547 [2021-08-06 20:02:55,246 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 968.0ms TimeCoverageRelationStatistics Valid=235, Invalid=1325, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 20:02:55,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1547 states. [2021-08-06 20:02:55,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1547 to 1230. [2021-08-06 20:02:55,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1230 states, 1229 states have (on average 1.8120423108218064) internal successors, (2227), 1229 states have internal predecessors, (2227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:02:55,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1230 states to 1230 states and 2227 transitions. [2021-08-06 20:02:55,257 INFO L78 Accepts]: Start accepts. Automaton has 1230 states and 2227 transitions. Word has length 32 [2021-08-06 20:02:55,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:02:55,257 INFO L470 AbstractCegarLoop]: Abstraction has 1230 states and 2227 transitions. [2021-08-06 20:02:55,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:02:55,257 INFO L276 IsEmpty]: Start isEmpty. Operand 1230 states and 2227 transitions. [2021-08-06 20:02:55,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 20:02:55,259 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:02:55,259 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:02:55,305 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Ended with exit code 0 [2021-08-06 20:02:55,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-08-06 20:02:55,473 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:02:55,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:02:55,473 INFO L82 PathProgramCache]: Analyzing trace with hash 435482078, now seen corresponding path program 137 times [2021-08-06 20:02:55,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:02:55,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632165965] [2021-08-06 20:02:55,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:02:55,473 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:02:55,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:02:55,543 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 63.3 percent of original size [2021-08-06 20:02:55,545 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 63.3 percent of original size [2021-08-06 20:02:55,564 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 31.8 percent of original size [2021-08-06 20:02:55,565 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 31.8 percent of original size [2021-08-06 20:02:55,588 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 69.2 percent of original size [2021-08-06 20:02:55,590 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 69.2 percent of original size [2021-08-06 20:02:55,608 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 530, result has 9.1 percent of original size [2021-08-06 20:02:55,620 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 530, result has 9.1 percent of original size [2021-08-06 20:02:55,655 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 794, result has 1.4 percent of original size [2021-08-06 20:02:55,659 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 794, result has 1.4 percent of original size [2021-08-06 20:02:55,678 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 668, result has 1.6 percent of original size [2021-08-06 20:02:55,689 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 668, result has 1.6 percent of original size [2021-08-06 20:02:55,705 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 20:02:55,705 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 20:02:55,724 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:02:55,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:02:55,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632165965] [2021-08-06 20:02:55,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632165965] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:02:55,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821070019] [2021-08-06 20:02:55,725 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:02:55,725 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:02:55,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:02:55,725 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:02:55,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2021-08-06 20:03:02,854 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 20:03:02,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:03:02,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 20:03:02,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:03:03,124 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 20:03:03,126 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 20:03:03,827 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:03:03,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821070019] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:03,827 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:03:03,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-06 20:03:03,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354202492] [2021-08-06 20:03:03,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:03:03,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:03:03,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:03:03,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:03:03,828 INFO L87 Difference]: Start difference. First operand 1230 states and 2227 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:04,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:03:04,549 INFO L93 Difference]: Finished difference Result 1437 states and 2546 transitions. [2021-08-06 20:03:04,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 20:03:04,550 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-06 20:03:04,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:03:04,551 INFO L225 Difference]: With dead ends: 1437 [2021-08-06 20:03:04,551 INFO L226 Difference]: Without dead ends: 1422 [2021-08-06 20:03:04,552 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 898.6ms TimeCoverageRelationStatistics Valid=336, Invalid=1386, Unknown=0, NotChecked=0, Total=1722 [2021-08-06 20:03:04,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1422 states. [2021-08-06 20:03:04,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1422 to 1254. [2021-08-06 20:03:04,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1254 states, 1253 states have (on average 1.8060654429369514) internal successors, (2263), 1253 states have internal predecessors, (2263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:04,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1254 states to 1254 states and 2263 transitions. [2021-08-06 20:03:04,564 INFO L78 Accepts]: Start accepts. Automaton has 1254 states and 2263 transitions. Word has length 32 [2021-08-06 20:03:04,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:03:04,564 INFO L470 AbstractCegarLoop]: Abstraction has 1254 states and 2263 transitions. [2021-08-06 20:03:04,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:04,564 INFO L276 IsEmpty]: Start isEmpty. Operand 1254 states and 2263 transitions. [2021-08-06 20:03:04,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 20:03:04,565 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:03:04,565 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:03:04,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Forceful destruction successful, exit code 0 [2021-08-06 20:03:04,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-08-06 20:03:04,766 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:03:04,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:03:04,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1495124566, now seen corresponding path program 138 times [2021-08-06 20:03:04,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:03:04,766 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845792158] [2021-08-06 20:03:04,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:03:04,766 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:03:04,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:04,831 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 57.6 percent of original size [2021-08-06 20:03:04,833 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 57.6 percent of original size [2021-08-06 20:03:04,851 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:03:04,852 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:03:04,890 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 354, result has 13.7 percent of original size [2021-08-06 20:03:04,898 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 354, result has 13.7 percent of original size [2021-08-06 20:03:04,938 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 865, result has 6.1 percent of original size [2021-08-06 20:03:05,009 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 865, result has 6.1 percent of original size [2021-08-06 20:03:05,050 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 342, result has 3.1 percent of original size [2021-08-06 20:03:05,052 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 342, result has 3.1 percent of original size [2021-08-06 20:03:05,066 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 20:03:05,067 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 20:03:05,075 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 20:03:05,076 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 20:03:05,096 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:03:05,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:03:05,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845792158] [2021-08-06 20:03:05,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845792158] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:05,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638357997] [2021-08-06 20:03:05,096 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:03:05,096 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:03:05,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:03:05,097 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:03:05,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2021-08-06 20:03:12,216 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-06 20:03:12,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:03:12,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 20:03:12,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:03:12,506 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 20:03:12,508 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 20:03:13,507 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:03:13,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638357997] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:13,507 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:03:13,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-06 20:03:13,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578792541] [2021-08-06 20:03:13,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:03:13,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:03:13,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:03:13,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:03:13,508 INFO L87 Difference]: Start difference. First operand 1254 states and 2263 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:14,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:03:14,198 INFO L93 Difference]: Finished difference Result 1509 states and 2665 transitions. [2021-08-06 20:03:14,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 20:03:14,198 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-06 20:03:14,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:03:14,199 INFO L225 Difference]: With dead ends: 1509 [2021-08-06 20:03:14,200 INFO L226 Difference]: Without dead ends: 1494 [2021-08-06 20:03:14,200 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 924.5ms TimeCoverageRelationStatistics Valid=233, Invalid=1327, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 20:03:14,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2021-08-06 20:03:14,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 1275. [2021-08-06 20:03:14,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1275 states, 1274 states have (on average 1.8092621664050235) internal successors, (2305), 1274 states have internal predecessors, (2305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:14,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1275 states to 1275 states and 2305 transitions. [2021-08-06 20:03:14,212 INFO L78 Accepts]: Start accepts. Automaton has 1275 states and 2305 transitions. Word has length 32 [2021-08-06 20:03:14,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:03:14,213 INFO L470 AbstractCegarLoop]: Abstraction has 1275 states and 2305 transitions. [2021-08-06 20:03:14,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:14,213 INFO L276 IsEmpty]: Start isEmpty. Operand 1275 states and 2305 transitions. [2021-08-06 20:03:14,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 20:03:14,214 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:03:14,214 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:03:14,257 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Ended with exit code 0 [2021-08-06 20:03:14,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:03:14,433 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:03:14,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:03:14,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1682814866, now seen corresponding path program 139 times [2021-08-06 20:03:14,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:03:14,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145867323] [2021-08-06 20:03:14,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:03:14,433 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:03:14,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:14,502 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 57.6 percent of original size [2021-08-06 20:03:14,504 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 57.6 percent of original size [2021-08-06 20:03:14,522 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:03:14,523 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 20:03:14,561 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 332, result has 18.0 percent of original size [2021-08-06 20:03:14,570 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 332, result has 18.0 percent of original size [2021-08-06 20:03:14,619 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 968, result has 9.4 percent of original size [2021-08-06 20:03:14,644 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 968, result has 9.4 percent of original size [2021-08-06 20:03:14,706 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 823, result has 2.8 percent of original size [2021-08-06 20:03:14,717 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 823, result has 2.8 percent of original size [2021-08-06 20:03:14,740 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 40.7 percent of original size [2021-08-06 20:03:14,742 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 40.7 percent of original size [2021-08-06 20:03:14,757 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 20:03:14,758 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 20:03:14,778 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:03:14,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:03:14,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145867323] [2021-08-06 20:03:14,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145867323] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:14,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365217120] [2021-08-06 20:03:14,778 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:03:14,778 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:03:14,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:03:14,779 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:03:14,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2021-08-06 20:03:22,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:22,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 20:03:22,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:03:22,290 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 20:03:22,293 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 20:03:23,480 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:03:23,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365217120] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:23,481 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:03:23,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-06 20:03:23,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822066557] [2021-08-06 20:03:23,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:03:23,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:03:23,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:03:23,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:03:23,481 INFO L87 Difference]: Start difference. First operand 1275 states and 2305 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:24,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:03:24,338 INFO L93 Difference]: Finished difference Result 1545 states and 2723 transitions. [2021-08-06 20:03:24,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 20:03:24,338 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-06 20:03:24,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:03:24,340 INFO L225 Difference]: With dead ends: 1545 [2021-08-06 20:03:24,340 INFO L226 Difference]: Without dead ends: 1526 [2021-08-06 20:03:24,340 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 1150.7ms TimeCoverageRelationStatistics Valid=269, Invalid=1371, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 20:03:24,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1526 states. [2021-08-06 20:03:24,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1526 to 1267. [2021-08-06 20:03:24,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1267 states, 1266 states have (on average 1.8104265402843602) internal successors, (2292), 1266 states have internal predecessors, (2292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:24,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1267 states to 1267 states and 2292 transitions. [2021-08-06 20:03:24,351 INFO L78 Accepts]: Start accepts. Automaton has 1267 states and 2292 transitions. Word has length 32 [2021-08-06 20:03:24,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:03:24,351 INFO L470 AbstractCegarLoop]: Abstraction has 1267 states and 2292 transitions. [2021-08-06 20:03:24,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:24,351 INFO L276 IsEmpty]: Start isEmpty. Operand 1267 states and 2292 transitions. [2021-08-06 20:03:24,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 20:03:24,352 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:03:24,352 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:03:24,388 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Ended with exit code 0 [2021-08-06 20:03:24,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:03:24,552 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:03:24,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:03:24,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1326229198, now seen corresponding path program 140 times [2021-08-06 20:03:24,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:03:24,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822216032] [2021-08-06 20:03:24,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:03:24,553 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:03:24,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:24,641 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 55.6 percent of original size [2021-08-06 20:03:24,643 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 55.6 percent of original size [2021-08-06 20:03:24,658 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 20:03:24,659 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 20:03:24,684 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 353, result has 14.5 percent of original size [2021-08-06 20:03:24,694 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 353, result has 14.5 percent of original size [2021-08-06 20:03:24,726 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 884, result has 1.2 percent of original size [2021-08-06 20:03:24,731 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 884, result has 1.2 percent of original size [2021-08-06 20:03:24,745 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 311, result has 3.4 percent of original size [2021-08-06 20:03:24,749 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 311, result has 3.4 percent of original size [2021-08-06 20:03:24,763 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 20:03:24,764 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 23.1 percent of original size [2021-08-06 20:03:24,772 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 20:03:24,772 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 20:03:24,792 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:03:24,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:03:24,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822216032] [2021-08-06 20:03:24,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822216032] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:24,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033863294] [2021-08-06 20:03:24,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:03:24,792 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:03:24,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:03:24,793 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:03:24,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2021-08-06 20:03:32,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:03:32,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:03:32,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 20:03:32,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:03:32,441 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 20:03:32,444 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 20:03:33,389 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:03:33,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033863294] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:33,389 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:03:33,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-06 20:03:33,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400379407] [2021-08-06 20:03:33,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:03:33,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:03:33,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:03:33,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:03:33,390 INFO L87 Difference]: Start difference. First operand 1267 states and 2292 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:34,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:03:34,086 INFO L93 Difference]: Finished difference Result 1400 states and 2500 transitions. [2021-08-06 20:03:34,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 20:03:34,087 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-06 20:03:34,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:03:34,088 INFO L225 Difference]: With dead ends: 1400 [2021-08-06 20:03:34,088 INFO L226 Difference]: Without dead ends: 1385 [2021-08-06 20:03:34,088 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 872.7ms TimeCoverageRelationStatistics Valid=310, Invalid=1582, Unknown=0, NotChecked=0, Total=1892 [2021-08-06 20:03:34,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1385 states. [2021-08-06 20:03:34,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1385 to 1280. [2021-08-06 20:03:34,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1280 states, 1279 states have (on average 1.8100078186082877) internal successors, (2315), 1279 states have internal predecessors, (2315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:34,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1280 states to 1280 states and 2315 transitions. [2021-08-06 20:03:34,099 INFO L78 Accepts]: Start accepts. Automaton has 1280 states and 2315 transitions. Word has length 32 [2021-08-06 20:03:34,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:03:34,099 INFO L470 AbstractCegarLoop]: Abstraction has 1280 states and 2315 transitions. [2021-08-06 20:03:34,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:34,099 INFO L276 IsEmpty]: Start isEmpty. Operand 1280 states and 2315 transitions. [2021-08-06 20:03:34,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 20:03:34,100 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:03:34,100 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:03:34,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Forceful destruction successful, exit code 0 [2021-08-06 20:03:34,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-08-06 20:03:34,301 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:03:34,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:03:34,301 INFO L82 PathProgramCache]: Analyzing trace with hash -900321954, now seen corresponding path program 141 times [2021-08-06 20:03:34,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:03:34,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902954072] [2021-08-06 20:03:34,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:03:34,301 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:03:34,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:34,431 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1456, result has 2.3 percent of original size [2021-08-06 20:03:34,441 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1456, result has 2.3 percent of original size [2021-08-06 20:03:34,470 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 2515, result has 0.4 percent of original size [2021-08-06 20:03:34,477 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 2515, result has 0.4 percent of original size [2021-08-06 20:03:34,501 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4311, result has 0.3 percent of original size [2021-08-06 20:03:34,521 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4311, result has 0.3 percent of original size [2021-08-06 20:03:34,542 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1024, result has 0.3 percent of original size [2021-08-06 20:03:34,554 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1024, result has 0.3 percent of original size [2021-08-06 20:03:34,563 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 20:03:34,563 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 20:03:34,584 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:03:34,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:03:34,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902954072] [2021-08-06 20:03:34,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902954072] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:34,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451097961] [2021-08-06 20:03:34,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:03:34,584 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:03:34,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:03:34,585 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:03:34,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2021-08-06 20:03:42,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-06 20:03:42,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:03:42,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 20:03:42,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:03:42,229 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 20:03:42,232 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 20:03:43,000 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:03:43,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451097961] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:43,001 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:03:43,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-06 20:03:43,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142089818] [2021-08-06 20:03:43,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:03:43,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:03:43,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:03:43,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:03:43,001 INFO L87 Difference]: Start difference. First operand 1280 states and 2315 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:43,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:03:43,588 INFO L93 Difference]: Finished difference Result 1390 states and 2479 transitions. [2021-08-06 20:03:43,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 20:03:43,589 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-06 20:03:43,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:03:43,590 INFO L225 Difference]: With dead ends: 1390 [2021-08-06 20:03:43,590 INFO L226 Difference]: Without dead ends: 1379 [2021-08-06 20:03:43,590 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 787.2ms TimeCoverageRelationStatistics Valid=302, Invalid=1504, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 20:03:43,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1379 states. [2021-08-06 20:03:43,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1379 to 1285. [2021-08-06 20:03:43,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1285 states, 1284 states have (on average 1.8115264797507789) internal successors, (2326), 1284 states have internal predecessors, (2326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:43,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1285 states to 1285 states and 2326 transitions. [2021-08-06 20:03:43,600 INFO L78 Accepts]: Start accepts. Automaton has 1285 states and 2326 transitions. Word has length 32 [2021-08-06 20:03:43,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:03:43,601 INFO L470 AbstractCegarLoop]: Abstraction has 1285 states and 2326 transitions. [2021-08-06 20:03:43,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:43,601 INFO L276 IsEmpty]: Start isEmpty. Operand 1285 states and 2326 transitions. [2021-08-06 20:03:43,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 20:03:43,602 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:03:43,602 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:03:43,639 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Ended with exit code 0 [2021-08-06 20:03:43,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:03:43,802 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:03:43,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:03:43,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1119599642, now seen corresponding path program 142 times [2021-08-06 20:03:43,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:03:43,803 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096934716] [2021-08-06 20:03:43,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:03:43,803 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:03:43,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:44,020 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 442, result has 14.7 percent of original size [2021-08-06 20:03:44,029 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 442, result has 14.7 percent of original size [2021-08-06 20:03:44,068 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 802, result has 8.7 percent of original size [2021-08-06 20:03:44,081 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 802, result has 8.7 percent of original size [2021-08-06 20:03:44,131 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3532, result has 0.3 percent of original size [2021-08-06 20:03:44,153 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3532, result has 0.3 percent of original size [2021-08-06 20:03:44,173 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 668, result has 1.6 percent of original size [2021-08-06 20:03:44,183 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 668, result has 1.6 percent of original size [2021-08-06 20:03:44,200 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 20:03:44,200 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 20:03:44,220 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:03:44,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:03:44,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096934716] [2021-08-06 20:03:44,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096934716] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:44,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912332092] [2021-08-06 20:03:44,221 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:03:44,221 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:03:44,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:03:44,222 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:03:44,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2021-08-06 20:03:51,629 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:03:51,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:03:51,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 20:03:51,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:03:51,826 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 20:03:51,829 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 68.6 percent of original size [2021-08-06 20:03:52,689 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:03:52,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912332092] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:52,689 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:03:52,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-06 20:03:52,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670075754] [2021-08-06 20:03:52,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:03:52,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:03:52,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:03:52,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:03:52,690 INFO L87 Difference]: Start difference. First operand 1285 states and 2326 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:53,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:03:53,322 INFO L93 Difference]: Finished difference Result 1514 states and 2685 transitions. [2021-08-06 20:03:53,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 20:03:53,323 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-06 20:03:53,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:03:53,324 INFO L225 Difference]: With dead ends: 1514 [2021-08-06 20:03:53,324 INFO L226 Difference]: Without dead ends: 1499 [2021-08-06 20:03:53,324 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 926.7ms TimeCoverageRelationStatistics Valid=278, Invalid=1204, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 20:03:53,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1499 states. [2021-08-06 20:03:53,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1499 to 1292. [2021-08-06 20:03:53,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1292 states, 1291 states have (on average 1.8140975987606507) internal successors, (2342), 1291 states have internal predecessors, (2342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:53,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1292 states to 1292 states and 2342 transitions. [2021-08-06 20:03:53,335 INFO L78 Accepts]: Start accepts. Automaton has 1292 states and 2342 transitions. Word has length 32 [2021-08-06 20:03:53,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:03:53,335 INFO L470 AbstractCegarLoop]: Abstraction has 1292 states and 2342 transitions. [2021-08-06 20:03:53,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:53,335 INFO L276 IsEmpty]: Start isEmpty. Operand 1292 states and 2342 transitions. [2021-08-06 20:03:53,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 20:03:53,336 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:03:53,336 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:03:53,374 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Ended with exit code 0 [2021-08-06 20:03:53,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:03:53,537 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:03:53,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:03:53,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1316851422, now seen corresponding path program 143 times [2021-08-06 20:03:53,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:03:53,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421247521] [2021-08-06 20:03:53,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:03:53,537 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:03:53,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:53,598 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 46.7 percent of original size [2021-08-06 20:03:53,599 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 46.7 percent of original size [2021-08-06 20:03:53,647 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 65.2 percent of original size [2021-08-06 20:03:53,649 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 65.2 percent of original size [2021-08-06 20:03:53,670 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 837, result has 7.1 percent of original size [2021-08-06 20:03:53,689 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 837, result has 7.1 percent of original size [2021-08-06 20:03:53,726 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1114, result has 1.0 percent of original size [2021-08-06 20:03:53,732 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1114, result has 1.0 percent of original size [2021-08-06 20:03:53,751 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 686, result has 1.6 percent of original size [2021-08-06 20:03:53,760 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 686, result has 1.6 percent of original size [2021-08-06 20:03:53,775 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 20:03:53,776 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 20:03:53,795 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:03:53,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:03:53,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421247521] [2021-08-06 20:03:53,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421247521] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:53,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312498795] [2021-08-06 20:03:53,796 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:03:53,796 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:03:53,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:03:53,797 INFO L229 MonitoredProcess]: Starting monitored process 151 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:03:53,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2021-08-06 20:04:01,319 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 20:04:01,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:04:01,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 20:04:01,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:04:01,421 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 91.9 percent of original size [2021-08-06 20:04:01,424 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 91.9 percent of original size [2021-08-06 20:04:01,497 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 65.2 percent of original size [2021-08-06 20:04:01,499 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 65.2 percent of original size [2021-08-06 20:04:02,166 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:04:02,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312498795] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:04:02,166 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:04:02,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-06 20:04:02,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906926573] [2021-08-06 20:04:02,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:04:02,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:04:02,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:04:02,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:04:02,167 INFO L87 Difference]: Start difference. First operand 1292 states and 2342 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:03,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:04:03,251 INFO L93 Difference]: Finished difference Result 1730 states and 3035 transitions. [2021-08-06 20:04:03,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-06 20:04:03,251 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-06 20:04:03,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:04:03,253 INFO L225 Difference]: With dead ends: 1730 [2021-08-06 20:04:03,253 INFO L226 Difference]: Without dead ends: 1711 [2021-08-06 20:04:03,254 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 1195.6ms TimeCoverageRelationStatistics Valid=476, Invalid=2074, Unknown=0, NotChecked=0, Total=2550 [2021-08-06 20:04:03,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1711 states. [2021-08-06 20:04:03,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1711 to 1313. [2021-08-06 20:04:03,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1313 states, 1312 states have (on average 1.8125) internal successors, (2378), 1312 states have internal predecessors, (2378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:03,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1313 states to 1313 states and 2378 transitions. [2021-08-06 20:04:03,265 INFO L78 Accepts]: Start accepts. Automaton has 1313 states and 2378 transitions. Word has length 32 [2021-08-06 20:04:03,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:04:03,265 INFO L470 AbstractCegarLoop]: Abstraction has 1313 states and 2378 transitions. [2021-08-06 20:04:03,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:03,266 INFO L276 IsEmpty]: Start isEmpty. Operand 1313 states and 2378 transitions. [2021-08-06 20:04:03,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 20:04:03,267 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:04:03,267 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:04:03,305 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Ended with exit code 0 [2021-08-06 20:04:03,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:04:03,467 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:04:03,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:04:03,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1918473386, now seen corresponding path program 144 times [2021-08-06 20:04:03,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:04:03,467 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231459801] [2021-08-06 20:04:03,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:04:03,468 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:04:03,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:04:03,530 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 72.2 percent of original size [2021-08-06 20:04:03,533 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 72.2 percent of original size [2021-08-06 20:04:03,609 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 2384, result has 1.7 percent of original size [2021-08-06 20:04:03,624 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 2384, result has 1.7 percent of original size [2021-08-06 20:04:03,671 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3513, result has 1.8 percent of original size [2021-08-06 20:04:03,707 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3513, result has 1.8 percent of original size [2021-08-06 20:04:03,753 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3278, result has 0.3 percent of original size [2021-08-06 20:04:03,759 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3278, result has 0.3 percent of original size [2021-08-06 20:04:03,777 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1042, result has 0.3 percent of original size [2021-08-06 20:04:03,782 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1042, result has 0.3 percent of original size [2021-08-06 20:04:03,791 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 20:04:03,792 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 18.8 percent of original size [2021-08-06 20:04:03,812 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:04:03,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:04:03,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231459801] [2021-08-06 20:04:03,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231459801] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:04:03,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958978275] [2021-08-06 20:04:03,813 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:04:03,813 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:04:03,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:04:03,813 INFO L229 MonitoredProcess]: Starting monitored process 152 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:04:03,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process Received shutdown request... [2021-08-06 20:04:06,696 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-06 20:04:06,696 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-06 20:04:07,699 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-06 20:04:07,741 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Ended with exit code 0 [2021-08-06 20:04:07,748 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 [2021-08-06 20:04:07,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:04:07,900 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 33 with TraceHistMax 6,while executing Executor. [2021-08-06 20:04:07,902 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-06 20:04:07,902 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-06 20:04:07,902 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION [2021-08-06 20:04:07,905 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-06 20:04:07,905 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-06 20:04:07,906 INFO L202 PluginConnector]: Adding new model misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.08 08:04:07 BasicIcfg [2021-08-06 20:04:07,906 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-06 20:04:07,907 INFO L168 Benchmark]: Toolchain (without parser) took 698220.81 ms. Allocated memory was 205.5 MB in the beginning and 1.9 GB in the end (delta: 1.7 GB). Free memory was 186.5 MB in the beginning and 432.9 MB in the end (delta: -246.3 MB). Peak memory consumption was 1.7 GB. Max. memory is 8.0 GB. [2021-08-06 20:04:07,907 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 205.5 MB. Free memory is still 187.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-06 20:04:07,907 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.20 ms. Allocated memory is still 205.5 MB. Free memory was 186.4 MB in the beginning and 185.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-06 20:04:07,907 INFO L168 Benchmark]: Boogie Preprocessor took 17.96 ms. Allocated memory is still 205.5 MB. Free memory was 185.0 MB in the beginning and 184.0 MB in the end (delta: 959.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-06 20:04:07,907 INFO L168 Benchmark]: RCFGBuilder took 258.70 ms. Allocated memory is still 205.5 MB. Free memory was 183.9 MB in the beginning and 169.7 MB in the end (delta: 14.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-08-06 20:04:07,907 INFO L168 Benchmark]: TraceAbstraction took 697916.45 ms. Allocated memory was 205.5 MB in the beginning and 1.9 GB in the end (delta: 1.7 GB). Free memory was 169.3 MB in the beginning and 432.9 MB in the end (delta: -263.6 MB). Peak memory consumption was 1.6 GB. Max. memory is 8.0 GB. [2021-08-06 20:04:07,907 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 0.14 ms. Allocated memory is still 205.5 MB. Free memory is still 187.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 23.20 ms. Allocated memory is still 205.5 MB. Free memory was 186.4 MB in the beginning and 185.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Preprocessor took 17.96 ms. Allocated memory is still 205.5 MB. Free memory was 185.0 MB in the beginning and 184.0 MB in the end (delta: 959.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 258.70 ms. Allocated memory is still 205.5 MB. Free memory was 183.9 MB in the beginning and 169.7 MB in the end (delta: 14.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 697916.45 ms. Allocated memory was 205.5 MB in the beginning and 1.9 GB in the end (delta: 1.7 GB). Free memory was 169.3 MB in the beginning and 432.9 MB in the end (delta: -263.6 MB). Peak memory consumption was 1.6 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 176, positive: 134, positive conditional: 134, positive unconditional: 0, negative: 42, negative conditional: 42, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 158, positive: 134, positive conditional: 0, positive unconditional: 134, negative: 24, negative conditional: 0, negative unconditional: 24, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 52, positive: 46, positive conditional: 0, positive unconditional: 46, negative: 6, negative conditional: 0, negative unconditional: 6, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 52, positive: 45, positive conditional: 0, positive unconditional: 45, negative: 7, negative conditional: 0, negative unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 7, positive: 1, positive conditional: 0, positive unconditional: 1, negative: 6, negative conditional: 0, negative unconditional: 6, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 69, positive: 29, positive conditional: 0, positive unconditional: 29, negative: 40, negative conditional: 0, negative unconditional: 40, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 158, positive: 88, positive conditional: 0, positive unconditional: 88, negative: 18, negative conditional: 0, negative unconditional: 18, unknown: 52, unknown conditional: 0, unknown unconditional: 52] , Statistics on independence cache: Total cache size (in pairs): 52, Positive cache size: 46, Positive conditional cache size: 0, Positive unconditional cache size: 46, Negative cache size: 6, Negative conditional cache size: 0, Negative unconditional cache size: 6, Independence queries for same thread: 18 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 70]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 33 with TraceHistMax 6,while executing Executor. - TimeoutResultAtElement [Line: 65]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 33 with TraceHistMax 6,while executing Executor. - TimeoutResultAtElement [Line: 64]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 33 with TraceHistMax 6,while executing Executor. - TimeoutResultAtElement [Line: 64]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 33 with TraceHistMax 6,while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 36 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 697782.8ms, OverallIterations: 154, TraceHistogramMax: 8, EmptinessCheckTime: 141.5ms, AutomataDifference: 62325.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 161.6ms, PartialOrderReductionTime: 145.3ms, HoareTripleCheckerStatistics: 2814 SDtfs, 16435 SDslu, 18509 SDs, 0 SdLazy, 25533 SolverSat, 6412 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 13951.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7434 GetRequests, 2969 SyntacticMatches, 0 SemanticMatches, 4465 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38141 ImplicationChecksByTransitivity, 78107.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1313occurred in iteration=153, InterpolantAutomatonStates: 2462, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1101.1ms AutomataMinimizationTime, 153 MinimizatonAttempts, 20164 StatesRemovedByMinimization, 152 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 495.6ms SsaConstructionTime, 2397.6ms SatisfiabilityAnalysisTime, 139577.8ms InterpolantComputationTime, 8308 NumberOfCodeBlocks, 8308 NumberOfCodeBlocksAsserted, 696 NumberOfCheckSat, 8005 ConstructedInterpolants, 0 QuantifiedInterpolants, 87382 SizeOfPredicates, 443 NumberOfNonLiveVariables, 8032 ConjunctsInSsa, 1913 ConjunctsInUnsatCore, 303 InterpolantComputations, 3 PerfectInterpolantSequences, 832/8201 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