/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.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/send-receive.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 12:48:50,380 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 12:48:50,382 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 12:48:50,420 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-21 12:48:50,491 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-08-21 12:48:50,523 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 12:48:50,523 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 12:48:50,524 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-21 12:48:50,524 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-21 12:48:50,526 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 12:48:50,527 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 12:48:50,527 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 12:48:50,527 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 12:48:50,527 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 12:48:50,527 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 12:48:50,528 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 12:48:50,528 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 12:48:50,528 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 12:48:50,529 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 12:48:50,529 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 12:48:50,529 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 12:48:50,529 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 12:48:50,529 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 12:48:50,529 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 12:48:50,529 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 12:48:50,529 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 12:48:50,530 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 12:48:50,530 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 12:48:50,530 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 12:48:50,530 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 12:48:50,530 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 12:48:50,530 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 12:48:50,530 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 12:48:50,531 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 12:48:50,531 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 12:48:50,531 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 12:48:50,531 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 12:48:50,837 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 12:48:50,865 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 12:48:50,867 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 12:48:50,867 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 12:48:50,871 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 12:48:50,872 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/send-receive.wvr.bpl [2021-08-21 12:48:50,872 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/send-receive.wvr.bpl' [2021-08-21 12:48:50,917 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 12:48:50,918 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 12:48:50,919 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 12:48:50,919 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 12:48:50,919 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 12:48:50,929 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "send-receive.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:48:50" (1/1) ... [2021-08-21 12:48:50,936 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "send-receive.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:48:50" (1/1) ... [2021-08-21 12:48:50,944 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 12:48:50,949 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 12:48:50,949 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 12:48:50,950 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 12:48:50,956 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "send-receive.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:48:50" (1/1) ... [2021-08-21 12:48:50,956 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "send-receive.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:48:50" (1/1) ... [2021-08-21 12:48:50,957 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "send-receive.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:48:50" (1/1) ... [2021-08-21 12:48:50,957 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "send-receive.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:48:50" (1/1) ... [2021-08-21 12:48:50,961 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "send-receive.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:48:50" (1/1) ... [2021-08-21 12:48:50,964 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "send-receive.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:48:50" (1/1) ... [2021-08-21 12:48:50,965 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "send-receive.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:48:50" (1/1) ... [2021-08-21 12:48:50,966 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 12:48:50,967 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 12:48:50,967 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 12:48:50,967 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 12:48:50,969 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "send-receive.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:48:50" (1/1) ... [2021-08-21 12:48:50,976 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 12:48:50,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:48:50,995 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) [2021-08-21 12:48:50,997 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 [2021-08-21 12:48:51,037 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 12:48:51,037 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 12:48:51,037 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 12:48:51,037 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 12:48:51,037 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 12:48:51,038 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 12:48:51,038 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 12:48:51,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 12:48:51,038 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 12:48:51,038 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-21 12:48:51,038 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-21 12:48:51,038 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-21 12:48:51,039 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-21 12:48:51,255 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 12:48:51,256 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-21 12:48:51,257 INFO L202 PluginConnector]: Adding new model send-receive.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 12:48:51 BoogieIcfgContainer [2021-08-21 12:48:51,258 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 12:48:51,259 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 12:48:51,259 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 12:48:51,261 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 12:48:51,262 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "send-receive.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:48:50" (1/2) ... [2021-08-21 12:48:51,262 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a130042 and model type send-receive.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 12:48:51, skipping insertion in model container [2021-08-21 12:48:51,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "send-receive.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 12:48:51" (2/2) ... [2021-08-21 12:48:51,264 INFO L111 eAbstractionObserver]: Analyzing ICFG send-receive.wvr.bpl [2021-08-21 12:48:51,268 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 12:48:51,268 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 12:48:51,268 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 12:48:51,268 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 12:48:51,323 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-08-21 12:48:51,359 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 12:48:51,364 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 [2021-08-21 12:48:51,364 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-21 12:48:51,373 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 37 places, 30 transitions, 84 flow [2021-08-21 12:48:51,404 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 147 states, 146 states have (on average 2.76027397260274) internal successors, (403), 146 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:51,408 INFO L276 IsEmpty]: Start isEmpty. Operand has 147 states, 146 states have (on average 2.76027397260274) internal successors, (403), 146 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:51,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:48:51,420 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:48:51,421 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:48:51,421 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:48:51,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:48:51,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1207872569, now seen corresponding path program 1 times [2021-08-21 12:48:51,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:48:51,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566088672] [2021-08-21 12:48:51,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:48:51,437 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:48:51,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:48:51,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:51,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:48:51,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566088672] [2021-08-21 12:48:51,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566088672] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:48:51,568 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:48:51,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 12:48:51,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391475332] [2021-08-21 12:48:51,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 12:48:51,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:48:51,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 12:48:51,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 12:48:51,591 INFO L87 Difference]: Start difference. First operand has 147 states, 146 states have (on average 2.76027397260274) internal successors, (403), 146 states have internal predecessors, (403), 0 states have call successors, (0), 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 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:51,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:48:51,636 INFO L93 Difference]: Finished difference Result 159 states and 404 transitions. [2021-08-21 12:48:51,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 12:48:51,638 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:48:51,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:48:51,653 INFO L225 Difference]: With dead ends: 159 [2021-08-21 12:48:51,653 INFO L226 Difference]: Without dead ends: 101 [2021-08-21 12:48:51,655 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 12:48:51,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-08-21 12:48:51,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-08-21 12:48:51,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.39) internal successors, (239), 100 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:51,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 239 transitions. [2021-08-21 12:48:51,703 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 239 transitions. Word has length 17 [2021-08-21 12:48:51,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:48:51,703 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 239 transitions. [2021-08-21 12:48:51,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:51,704 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 239 transitions. [2021-08-21 12:48:51,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:48:51,707 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:48:51,707 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:48:51,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 12:48:51,708 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:48:51,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:48:51,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1862171129, now seen corresponding path program 2 times [2021-08-21 12:48:51,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:48:51,712 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81118380] [2021-08-21 12:48:51,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:48:51,713 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:48:51,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:48:51,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:51,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:48:51,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81118380] [2021-08-21 12:48:51,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81118380] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:48:51,780 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:48:51,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 12:48:51,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403036726] [2021-08-21 12:48:51,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 12:48:51,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:48:51,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 12:48:51,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:48:51,783 INFO L87 Difference]: Start difference. First operand 101 states and 239 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:51,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:48:51,812 INFO L93 Difference]: Finished difference Result 153 states and 362 transitions. [2021-08-21 12:48:51,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:48:51,812 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:48:51,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:48:51,814 INFO L225 Difference]: With dead ends: 153 [2021-08-21 12:48:51,814 INFO L226 Difference]: Without dead ends: 123 [2021-08-21 12:48:51,815 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:48:51,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-08-21 12:48:51,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2021-08-21 12:48:51,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.4344262295081966) internal successors, (297), 122 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:51,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 297 transitions. [2021-08-21 12:48:51,824 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 297 transitions. Word has length 17 [2021-08-21 12:48:51,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:48:51,825 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 297 transitions. [2021-08-21 12:48:51,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:51,825 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 297 transitions. [2021-08-21 12:48:51,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:48:51,826 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:48:51,826 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:48:51,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 12:48:51,827 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:48:51,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:48:51,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1723054331, now seen corresponding path program 1 times [2021-08-21 12:48:51,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:48:51,828 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841892661] [2021-08-21 12:48:51,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:48:51,828 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:48:51,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:48:51,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:51,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:48:51,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841892661] [2021-08-21 12:48:51,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841892661] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:48:51,853 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:48:51,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 12:48:51,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791830950] [2021-08-21 12:48:51,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 12:48:51,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:48:51,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 12:48:51,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 12:48:51,854 INFO L87 Difference]: Start difference. First operand 123 states and 297 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:51,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:48:51,862 INFO L93 Difference]: Finished difference Result 137 states and 328 transitions. [2021-08-21 12:48:51,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 12:48:51,863 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:48:51,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:48:51,864 INFO L225 Difference]: With dead ends: 137 [2021-08-21 12:48:51,864 INFO L226 Difference]: Without dead ends: 137 [2021-08-21 12:48:51,864 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 12:48:51,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-08-21 12:48:51,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2021-08-21 12:48:51,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.411764705882353) internal successors, (328), 136 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:51,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 328 transitions. [2021-08-21 12:48:51,874 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 328 transitions. Word has length 19 [2021-08-21 12:48:51,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:48:51,874 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 328 transitions. [2021-08-21 12:48:51,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:51,874 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 328 transitions. [2021-08-21 12:48:51,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:48:51,876 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:48:51,876 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:48:51,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-21 12:48:51,876 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:48:51,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:48:51,877 INFO L82 PathProgramCache]: Analyzing trace with hash 492267679, now seen corresponding path program 1 times [2021-08-21 12:48:51,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:48:51,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201290135] [2021-08-21 12:48:51,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:48:51,877 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:48:51,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:48:51,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:51,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:48:51,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201290135] [2021-08-21 12:48:51,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201290135] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:51,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996032669] [2021-08-21 12:48:51,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:48:51,981 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:48:51,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:48:51,983 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) [2021-08-21 12:48:51,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-21 12:48:52,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:48:52,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:48:52,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:48:52,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-08-21 12:48:52,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:52,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996032669] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:52,403 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:48:52,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 12:48:52,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518216578] [2021-08-21 12:48:52,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:48:52,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:48:52,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:48:52,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:48:52,406 INFO L87 Difference]: Start difference. First operand 137 states and 328 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) [2021-08-21 12:48:52,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:48:52,496 INFO L93 Difference]: Finished difference Result 207 states and 501 transitions. [2021-08-21 12:48:52,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:48:52,497 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 23 [2021-08-21 12:48:52,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:48:52,498 INFO L225 Difference]: With dead ends: 207 [2021-08-21 12:48:52,498 INFO L226 Difference]: Without dead ends: 177 [2021-08-21 12:48:52,499 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 61.7ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:48:52,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-08-21 12:48:52,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 157. [2021-08-21 12:48:52,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.448717948717949) internal successors, (382), 156 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:52,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 382 transitions. [2021-08-21 12:48:52,508 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 382 transitions. Word has length 23 [2021-08-21 12:48:52,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:48:52,508 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 382 transitions. [2021-08-21 12:48:52,508 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) [2021-08-21 12:48:52,509 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 382 transitions. [2021-08-21 12:48:52,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:48:52,510 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:48:52,510 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:48:52,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-21 12:48:52,732 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 [2021-08-21 12:48:52,733 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:48:52,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:48:52,733 INFO L82 PathProgramCache]: Analyzing trace with hash -306693953, now seen corresponding path program 1 times [2021-08-21 12:48:52,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:48:52,733 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010750988] [2021-08-21 12:48:52,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:48:52,734 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:48:52,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:48:52,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:52,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:48:52,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010750988] [2021-08-21 12:48:52,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010750988] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:48:52,760 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:48:52,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 12:48:52,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324426994] [2021-08-21 12:48:52,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 12:48:52,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:48:52,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 12:48:52,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 12:48:52,762 INFO L87 Difference]: Start difference. First operand 157 states and 382 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 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) [2021-08-21 12:48:52,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:48:52,768 INFO L93 Difference]: Finished difference Result 175 states and 425 transitions. [2021-08-21 12:48:52,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 12:48:52,768 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 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 23 [2021-08-21 12:48:52,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:48:52,770 INFO L225 Difference]: With dead ends: 175 [2021-08-21 12:48:52,770 INFO L226 Difference]: Without dead ends: 175 [2021-08-21 12:48:52,770 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 12:48:52,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-08-21 12:48:52,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 153. [2021-08-21 12:48:52,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.4342105263157894) internal successors, (370), 152 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:52,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 370 transitions. [2021-08-21 12:48:52,778 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 370 transitions. Word has length 23 [2021-08-21 12:48:52,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:48:52,779 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 370 transitions. [2021-08-21 12:48:52,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 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) [2021-08-21 12:48:52,779 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 370 transitions. [2021-08-21 12:48:52,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 12:48:52,780 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:48:52,780 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:48:52,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-21 12:48:52,781 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:48:52,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:48:52,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1596160095, now seen corresponding path program 2 times [2021-08-21 12:48:52,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:48:52,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633714794] [2021-08-21 12:48:52,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:48:52,782 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:48:52,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:48:52,830 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:52,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:48:52,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633714794] [2021-08-21 12:48:52,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633714794] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:52,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627592121] [2021-08-21 12:48:52,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:48:52,831 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:48:52,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:48:52,833 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) [2021-08-21 12:48:52,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-21 12:48:52,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:48:52,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:48:52,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-21 12:48:52,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:48:53,017 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:48:53,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627592121] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:48:53,018 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-21 12:48:53,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2021-08-21 12:48:53,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773287678] [2021-08-21 12:48:53,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 12:48:53,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:48:53,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 12:48:53,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:48:53,020 INFO L87 Difference]: Start difference. First operand 153 states and 370 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:53,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:48:53,048 INFO L93 Difference]: Finished difference Result 401 states and 958 transitions. [2021-08-21 12:48:53,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 12:48:53,048 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 12:48:53,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:48:53,050 INFO L225 Difference]: With dead ends: 401 [2021-08-21 12:48:53,050 INFO L226 Difference]: Without dead ends: 393 [2021-08-21 12:48:53,051 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.4ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:48:53,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-08-21 12:48:53,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 259. [2021-08-21 12:48:53,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 2.5155038759689923) internal successors, (649), 258 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:53,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 649 transitions. [2021-08-21 12:48:53,064 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 649 transitions. Word has length 25 [2021-08-21 12:48:53,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:48:53,064 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 649 transitions. [2021-08-21 12:48:53,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:53,064 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 649 transitions. [2021-08-21 12:48:53,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:48:53,065 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:48:53,065 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:48:53,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-21 12:48:53,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-08-21 12:48:53,289 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:48:53,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:48:53,289 INFO L82 PathProgramCache]: Analyzing trace with hash 514888445, now seen corresponding path program 3 times [2021-08-21 12:48:53,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:48:53,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144707502] [2021-08-21 12:48:53,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:48:53,290 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:48:53,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:48:53,317 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:53,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:48:53,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144707502] [2021-08-21 12:48:53,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144707502] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:53,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92259224] [2021-08-21 12:48:53,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:48:53,318 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:48:53,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:48:53,322 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) [2021-08-21 12:48:53,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-21 12:48:53,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:48:53,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:48:53,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-21 12:48:53,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:48:53,514 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:53,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92259224] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:53,515 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:48:53,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 12:48:53,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489229382] [2021-08-21 12:48:53,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 12:48:53,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:48:53,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 12:48:53,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:48:53,520 INFO L87 Difference]: Start difference. First operand 259 states and 649 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 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) [2021-08-21 12:48:53,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:48:53,535 INFO L93 Difference]: Finished difference Result 363 states and 850 transitions. [2021-08-21 12:48:53,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 12:48:53,536 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 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 29 [2021-08-21 12:48:53,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:48:53,539 INFO L225 Difference]: With dead ends: 363 [2021-08-21 12:48:53,539 INFO L226 Difference]: Without dead ends: 363 [2021-08-21 12:48:53,540 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:48:53,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-08-21 12:48:53,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 319. [2021-08-21 12:48:53,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.39937106918239) internal successors, (763), 318 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) [2021-08-21 12:48:53,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 763 transitions. [2021-08-21 12:48:53,568 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 763 transitions. Word has length 29 [2021-08-21 12:48:53,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:48:53,568 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 763 transitions. [2021-08-21 12:48:53,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 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) [2021-08-21 12:48:53,578 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 763 transitions. [2021-08-21 12:48:53,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:48:53,580 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:48:53,581 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:48:53,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-21 12:48:53,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:48:53,782 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:48:53,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:48:53,782 INFO L82 PathProgramCache]: Analyzing trace with hash -284073187, now seen corresponding path program 1 times [2021-08-21 12:48:53,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:48:53,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777158792] [2021-08-21 12:48:53,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:48:53,782 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:48:53,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:48:54,013 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:54,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:48:54,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777158792] [2021-08-21 12:48:54,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777158792] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:54,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551820814] [2021-08-21 12:48:54,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:48:54,014 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:48:54,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:48:54,015 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) [2021-08-21 12:48:54,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-21 12:48:54,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:48:54,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 12:48:54,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:48:54,534 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-21 12:48:54,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 28 [2021-08-21 12:48:54,585 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:54,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551820814] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:54,585 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:48:54,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-08-21 12:48:54,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071736057] [2021-08-21 12:48:54,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:48:54,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:48:54,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:48:54,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:48:54,589 INFO L87 Difference]: Start difference. First operand 319 states and 763 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:54,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:48:54,720 INFO L93 Difference]: Finished difference Result 455 states and 1091 transitions. [2021-08-21 12:48:54,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:48:54,721 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:48:54,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:48:54,724 INFO L225 Difference]: With dead ends: 455 [2021-08-21 12:48:54,726 INFO L226 Difference]: Without dead ends: 415 [2021-08-21 12:48:54,727 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 179.6ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:48:54,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-08-21 12:48:54,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 351. [2021-08-21 12:48:54,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 2.3857142857142857) internal successors, (835), 350 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:54,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 835 transitions. [2021-08-21 12:48:54,745 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 835 transitions. Word has length 29 [2021-08-21 12:48:54,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:48:54,746 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 835 transitions. [2021-08-21 12:48:54,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:54,746 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 835 transitions. [2021-08-21 12:48:54,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:48:54,747 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:48:54,747 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:48:54,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-21 12:48:54,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:48:54,965 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:48:54,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:48:54,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1790737123, now seen corresponding path program 2 times [2021-08-21 12:48:54,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:48:54,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028205258] [2021-08-21 12:48:54,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:48:54,966 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:48:54,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:48:55,112 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:55,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:48:55,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028205258] [2021-08-21 12:48:55,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028205258] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:55,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325888821] [2021-08-21 12:48:55,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:48:55,113 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:48:55,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:48:55,117 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) [2021-08-21 12:48:55,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-21 12:48:55,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:48:55,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:48:55,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 12:48:55,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:48:55,522 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:48:55,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 19 [2021-08-21 12:48:55,552 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:55,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325888821] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:55,552 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:48:55,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-21 12:48:55,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582262619] [2021-08-21 12:48:55,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:48:55,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:48:55,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:48:55,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:48:55,554 INFO L87 Difference]: Start difference. First operand 351 states and 835 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:55,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:48:55,704 INFO L93 Difference]: Finished difference Result 483 states and 1151 transitions. [2021-08-21 12:48:55,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:48:55,704 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:48:55,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:48:55,706 INFO L225 Difference]: With dead ends: 483 [2021-08-21 12:48:55,706 INFO L226 Difference]: Without dead ends: 447 [2021-08-21 12:48:55,707 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 144.5ms TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:48:55,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-08-21 12:48:55,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 383. [2021-08-21 12:48:55,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 2.3952879581151834) internal successors, (915), 382 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:55,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 915 transitions. [2021-08-21 12:48:55,717 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 915 transitions. Word has length 29 [2021-08-21 12:48:55,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:48:55,717 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 915 transitions. [2021-08-21 12:48:55,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:55,717 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 915 transitions. [2021-08-21 12:48:55,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:48:55,718 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:48:55,718 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:48:55,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-21 12:48:55,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:48:55,942 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:48:55,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:48:55,942 INFO L82 PathProgramCache]: Analyzing trace with hash -835486561, now seen corresponding path program 3 times [2021-08-21 12:48:55,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:48:55,942 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26943321] [2021-08-21 12:48:55,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:48:55,943 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:48:55,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:48:55,995 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:55,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:48:55,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26943321] [2021-08-21 12:48:55,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26943321] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:55,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771571133] [2021-08-21 12:48:55,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:48:55,995 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:48:55,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:48:55,996 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) [2021-08-21 12:48:55,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-21 12:48:56,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:48:56,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:48:56,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 12:48:56,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:48:56,219 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:48:56,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771571133] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:56,220 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:48:56,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-21 12:48:56,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827841918] [2021-08-21 12:48:56,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 12:48:56,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:48:56,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 12:48:56,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:48:56,221 INFO L87 Difference]: Start difference. First operand 383 states and 915 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 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) [2021-08-21 12:48:56,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:48:56,245 INFO L93 Difference]: Finished difference Result 827 states and 1940 transitions. [2021-08-21 12:48:56,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:48:56,246 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 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 31 [2021-08-21 12:48:56,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:48:56,249 INFO L225 Difference]: With dead ends: 827 [2021-08-21 12:48:56,249 INFO L226 Difference]: Without dead ends: 819 [2021-08-21 12:48:56,250 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 12.6ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:48:56,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2021-08-21 12:48:56,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 463. [2021-08-21 12:48:56,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 2.448051948051948) internal successors, (1131), 462 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) [2021-08-21 12:48:56,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 1131 transitions. [2021-08-21 12:48:56,263 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 1131 transitions. Word has length 31 [2021-08-21 12:48:56,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:48:56,264 INFO L470 AbstractCegarLoop]: Abstraction has 463 states and 1131 transitions. [2021-08-21 12:48:56,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 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) [2021-08-21 12:48:56,264 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 1131 transitions. [2021-08-21 12:48:56,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 12:48:56,265 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:48:56,265 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:48:56,289 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-08-21 12:48:56,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:48:56,481 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:48:56,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:48:56,481 INFO L82 PathProgramCache]: Analyzing trace with hash -522701061, now seen corresponding path program 4 times [2021-08-21 12:48:56,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:48:56,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296777664] [2021-08-21 12:48:56,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:48:56,482 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:48:56,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:48:56,747 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:56,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:48:56,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296777664] [2021-08-21 12:48:56,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296777664] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:56,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877130508] [2021-08-21 12:48:56,748 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:48:56,748 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:48:56,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:48:56,749 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) [2021-08-21 12:48:56,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-21 12:48:56,890 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:48:56,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:48:56,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 12:48:56,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:48:57,461 INFO L354 Elim1Store]: treesize reduction 98, result has 6.7 percent of original size [2021-08-21 12:48:57,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 60 treesize of output 36 [2021-08-21 12:48:57,492 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:57,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877130508] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:57,493 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:48:57,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-08-21 12:48:57,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142039671] [2021-08-21 12:48:57,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:48:57,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:48:57,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:48:57,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:48:57,494 INFO L87 Difference]: Start difference. First operand 463 states and 1131 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 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) [2021-08-21 12:48:57,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:48:57,828 INFO L93 Difference]: Finished difference Result 851 states and 2063 transitions. [2021-08-21 12:48:57,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:48:57,828 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 12:48:57,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:48:57,831 INFO L225 Difference]: With dead ends: 851 [2021-08-21 12:48:57,831 INFO L226 Difference]: Without dead ends: 735 [2021-08-21 12:48:57,832 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 351.6ms TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:48:57,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2021-08-21 12:48:57,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 591. [2021-08-21 12:48:57,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 2.4322033898305087) internal successors, (1435), 590 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:57,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 1435 transitions. [2021-08-21 12:48:57,848 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 1435 transitions. Word has length 35 [2021-08-21 12:48:57,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:48:57,848 INFO L470 AbstractCegarLoop]: Abstraction has 591 states and 1435 transitions. [2021-08-21 12:48:57,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 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) [2021-08-21 12:48:57,848 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 1435 transitions. [2021-08-21 12:48:57,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 12:48:57,850 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:48:57,850 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:48:57,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-21 12:48:58,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:48:58,064 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:48:58,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:48:58,064 INFO L82 PathProgramCache]: Analyzing trace with hash 469623035, now seen corresponding path program 5 times [2021-08-21 12:48:58,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:48:58,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447737811] [2021-08-21 12:48:58,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:48:58,065 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:48:58,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:48:58,257 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:58,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:48:58,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447737811] [2021-08-21 12:48:58,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447737811] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:58,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390618249] [2021-08-21 12:48:58,258 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:48:58,258 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:48:58,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:48:58,259 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) [2021-08-21 12:48:58,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-21 12:48:58,469 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:48:58,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:48:58,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 12:48:58,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:48:59,023 INFO L354 Elim1Store]: treesize reduction 98, result has 6.7 percent of original size [2021-08-21 12:48:59,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 60 treesize of output 36 [2021-08-21 12:48:59,054 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:59,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390618249] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:59,055 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:48:59,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-08-21 12:48:59,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403965469] [2021-08-21 12:48:59,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:48:59,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:48:59,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:48:59,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:48:59,056 INFO L87 Difference]: Start difference. First operand 591 states and 1435 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 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) [2021-08-21 12:48:59,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:48:59,338 INFO L93 Difference]: Finished difference Result 1023 states and 2527 transitions. [2021-08-21 12:48:59,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:48:59,339 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 12:48:59,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:48:59,343 INFO L225 Difference]: With dead ends: 1023 [2021-08-21 12:48:59,343 INFO L226 Difference]: Without dead ends: 959 [2021-08-21 12:48:59,344 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 294.9ms TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:48:59,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2021-08-21 12:48:59,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 607. [2021-08-21 12:48:59,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 606 states have (on average 2.433993399339934) internal successors, (1475), 606 states have internal predecessors, (1475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:59,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 1475 transitions. [2021-08-21 12:48:59,360 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 1475 transitions. Word has length 35 [2021-08-21 12:48:59,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:48:59,361 INFO L470 AbstractCegarLoop]: Abstraction has 607 states and 1475 transitions. [2021-08-21 12:48:59,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 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) [2021-08-21 12:48:59,361 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 1475 transitions. [2021-08-21 12:48:59,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 12:48:59,362 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:48:59,362 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:48:59,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-21 12:48:59,585 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,SelfDestructingSolverStorable11 [2021-08-21 12:48:59,585 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:48:59,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:48:59,586 INFO L82 PathProgramCache]: Analyzing trace with hash 761846011, now seen corresponding path program 6 times [2021-08-21 12:48:59,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:48:59,586 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468764318] [2021-08-21 12:48:59,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:48:59,586 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:48:59,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:48:59,786 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:59,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:48:59,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468764318] [2021-08-21 12:48:59,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468764318] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:59,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078097388] [2021-08-21 12:48:59,787 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:48:59,787 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:48:59,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:48:59,789 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) [2021-08-21 12:48:59,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-21 12:49:00,084 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:49:00,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:49:00,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 12:49:00,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:49:00,619 INFO L354 Elim1Store]: treesize reduction 58, result has 4.9 percent of original size [2021-08-21 12:49:00,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 33 [2021-08-21 12:49:00,656 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:00,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078097388] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:00,656 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:49:00,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-08-21 12:49:00,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102500675] [2021-08-21 12:49:00,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:49:00,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:49:00,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:49:00,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:49:00,658 INFO L87 Difference]: Start difference. First operand 607 states and 1475 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:01,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:49:01,138 INFO L93 Difference]: Finished difference Result 1319 states and 3177 transitions. [2021-08-21 12:49:01,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:49:01,139 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 12:49:01,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:49:01,144 INFO L225 Difference]: With dead ends: 1319 [2021-08-21 12:49:01,144 INFO L226 Difference]: Without dead ends: 1103 [2021-08-21 12:49:01,144 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 403.8ms TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:49:01,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1103 states. [2021-08-21 12:49:01,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1103 to 671. [2021-08-21 12:49:01,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 670 states have (on average 2.428358208955224) internal successors, (1627), 670 states have internal predecessors, (1627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:01,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 1627 transitions. [2021-08-21 12:49:01,162 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 1627 transitions. Word has length 35 [2021-08-21 12:49:01,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:49:01,162 INFO L470 AbstractCegarLoop]: Abstraction has 671 states and 1627 transitions. [2021-08-21 12:49:01,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:01,162 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 1627 transitions. [2021-08-21 12:49:01,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 12:49:01,164 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:49:01,164 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:49:01,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-21 12:49:01,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-21 12:49:01,376 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:49:01,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:49:01,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1754170107, now seen corresponding path program 7 times [2021-08-21 12:49:01,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:49:01,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683861746] [2021-08-21 12:49:01,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:49:01,377 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:49:01,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:49:01,552 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:01,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:49:01,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683861746] [2021-08-21 12:49:01,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683861746] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:01,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834783146] [2021-08-21 12:49:01,553 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:49:01,553 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:01,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:49:01,555 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) [2021-08-21 12:49:01,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-21 12:49:01,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:49:01,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 12:49:01,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:49:02,368 INFO L354 Elim1Store]: treesize reduction 58, result has 4.9 percent of original size [2021-08-21 12:49:02,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 33 [2021-08-21 12:49:02,397 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:02,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834783146] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:02,397 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:49:02,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-08-21 12:49:02,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724913257] [2021-08-21 12:49:02,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:49:02,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:49:02,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:49:02,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:49:02,399 INFO L87 Difference]: Start difference. First operand 671 states and 1627 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:02,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:49:02,743 INFO L93 Difference]: Finished difference Result 1239 states and 3075 transitions. [2021-08-21 12:49:02,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:49:02,743 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 12:49:02,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:49:02,748 INFO L225 Difference]: With dead ends: 1239 [2021-08-21 12:49:02,748 INFO L226 Difference]: Without dead ends: 1151 [2021-08-21 12:49:02,749 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 289.1ms TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:49:02,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1151 states. [2021-08-21 12:49:02,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1151 to 543. [2021-08-21 12:49:02,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 542 states have (on average 2.440959409594096) internal successors, (1323), 542 states have internal predecessors, (1323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:02,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 1323 transitions. [2021-08-21 12:49:02,765 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 1323 transitions. Word has length 35 [2021-08-21 12:49:02,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:49:02,765 INFO L470 AbstractCegarLoop]: Abstraction has 543 states and 1323 transitions. [2021-08-21 12:49:02,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:02,766 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 1323 transitions. [2021-08-21 12:49:02,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 12:49:02,767 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:49:02,767 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:49:02,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-21 12:49:02,980 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,SelfDestructingSolverStorable13 [2021-08-21 12:49:02,981 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:49:02,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:49:02,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1894886651, now seen corresponding path program 8 times [2021-08-21 12:49:02,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:49:02,981 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639372400] [2021-08-21 12:49:02,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:49:02,982 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:49:03,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:49:03,170 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:03,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:49:03,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639372400] [2021-08-21 12:49:03,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639372400] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:03,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90061332] [2021-08-21 12:49:03,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:49:03,170 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:03,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:49:03,171 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) [2021-08-21 12:49:03,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-21 12:49:03,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:49:03,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:49:03,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 12:49:03,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:49:03,915 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-21 12:49:03,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 24 [2021-08-21 12:49:03,941 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:03,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90061332] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:03,941 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:49:03,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-08-21 12:49:03,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023185929] [2021-08-21 12:49:03,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:49:03,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:49:03,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:49:03,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:49:03,942 INFO L87 Difference]: Start difference. First operand 543 states and 1323 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:04,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:49:04,188 INFO L93 Difference]: Finished difference Result 787 states and 1911 transitions. [2021-08-21 12:49:04,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:49:04,189 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 12:49:04,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:49:04,192 INFO L225 Difference]: With dead ends: 787 [2021-08-21 12:49:04,192 INFO L226 Difference]: Without dead ends: 751 [2021-08-21 12:49:04,192 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 226.7ms TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:49:04,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2021-08-21 12:49:04,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 575. [2021-08-21 12:49:04,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 2.4442508710801394) internal successors, (1403), 574 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:04,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1403 transitions. [2021-08-21 12:49:04,206 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1403 transitions. Word has length 35 [2021-08-21 12:49:04,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:49:04,206 INFO L470 AbstractCegarLoop]: Abstraction has 575 states and 1403 transitions. [2021-08-21 12:49:04,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:04,206 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1403 transitions. [2021-08-21 12:49:04,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:49:04,207 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:49:04,207 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:49:04,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-21 12:49:04,423 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,SelfDestructingSolverStorable14 [2021-08-21 12:49:04,424 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:49:04,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:49:04,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1995908349, now seen corresponding path program 9 times [2021-08-21 12:49:04,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:49:04,424 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30800990] [2021-08-21 12:49:04,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:49:04,424 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:49:04,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:49:04,479 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:04,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:49:04,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30800990] [2021-08-21 12:49:04,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30800990] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:04,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426936776] [2021-08-21 12:49:04,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:49:04,480 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:04,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:49:04,481 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) [2021-08-21 12:49:04,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-21 12:49:04,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 12:49:04,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:49:04,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 12:49:04,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:49:05,000 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:49:05,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426936776] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:05,001 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:49:05,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-21 12:49:05,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179935472] [2021-08-21 12:49:05,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:49:05,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:49:05,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:49:05,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:49:05,002 INFO L87 Difference]: Start difference. First operand 575 states and 1403 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 6 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) [2021-08-21 12:49:05,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:49:05,028 INFO L93 Difference]: Finished difference Result 1199 states and 2863 transitions. [2021-08-21 12:49:05,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 12:49:05,037 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 6 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 37 [2021-08-21 12:49:05,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:49:05,042 INFO L225 Difference]: With dead ends: 1199 [2021-08-21 12:49:05,042 INFO L226 Difference]: Without dead ends: 1191 [2021-08-21 12:49:05,042 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 18.0ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:49:05,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1191 states. [2021-08-21 12:49:05,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1191 to 671. [2021-08-21 12:49:05,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 670 states have (on average 2.476119402985075) internal successors, (1659), 670 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:05,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 1659 transitions. [2021-08-21 12:49:05,062 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 1659 transitions. Word has length 37 [2021-08-21 12:49:05,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:49:05,062 INFO L470 AbstractCegarLoop]: Abstraction has 671 states and 1659 transitions. [2021-08-21 12:49:05,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 6 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) [2021-08-21 12:49:05,062 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 1659 transitions. [2021-08-21 12:49:05,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:49:05,064 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:49:05,064 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:49:05,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-21 12:49:05,276 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,SelfDestructingSolverStorable15 [2021-08-21 12:49:05,277 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:49:05,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:49:05,277 INFO L82 PathProgramCache]: Analyzing trace with hash -944036231, now seen corresponding path program 10 times [2021-08-21 12:49:05,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:49:05,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688041357] [2021-08-21 12:49:05,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:49:05,278 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:49:05,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:49:05,536 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:49:05,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:49:05,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688041357] [2021-08-21 12:49:05,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688041357] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:05,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438499869] [2021-08-21 12:49:05,536 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:49:05,537 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:05,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:49:05,541 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) [2021-08-21 12:49:05,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-21 12:49:05,926 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:49:05,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:49:05,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 12:49:05,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:49:06,704 INFO L354 Elim1Store]: treesize reduction 219, result has 4.4 percent of original size [2021-08-21 12:49:06,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 79 treesize of output 46 [2021-08-21 12:49:06,735 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 9 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:06,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438499869] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:06,735 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:49:06,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-08-21 12:49:06,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426679994] [2021-08-21 12:49:06,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:49:06,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:49:06,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:49:06,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:49:06,737 INFO L87 Difference]: Start difference. First operand 671 states and 1659 transitions. Second operand has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:07,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:49:07,256 INFO L93 Difference]: Finished difference Result 1511 states and 3681 transitions. [2021-08-21 12:49:07,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:49:07,256 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-21 12:49:07,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:49:07,261 INFO L225 Difference]: With dead ends: 1511 [2021-08-21 12:49:07,262 INFO L226 Difference]: Without dead ends: 1295 [2021-08-21 12:49:07,262 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 481.6ms TimeCoverageRelationStatistics Valid=151, Invalid=719, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:49:07,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1295 states. [2021-08-21 12:49:07,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1295 to 895. [2021-08-21 12:49:07,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 894 states have (on average 2.446308724832215) internal successors, (2187), 894 states have internal predecessors, (2187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:07,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 2187 transitions. [2021-08-21 12:49:07,281 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 2187 transitions. Word has length 41 [2021-08-21 12:49:07,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:49:07,281 INFO L470 AbstractCegarLoop]: Abstraction has 895 states and 2187 transitions. [2021-08-21 12:49:07,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:07,281 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 2187 transitions. [2021-08-21 12:49:07,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:49:07,283 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:49:07,283 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:49:07,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-21 12:49:07,507 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,SelfDestructingSolverStorable16 [2021-08-21 12:49:07,507 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:49:07,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:49:07,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1844267129, now seen corresponding path program 11 times [2021-08-21 12:49:07,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:49:07,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707248128] [2021-08-21 12:49:07,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:49:07,508 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:49:07,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:49:07,721 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:07,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:49:07,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707248128] [2021-08-21 12:49:07,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707248128] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:07,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365789037] [2021-08-21 12:49:07,721 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:49:07,721 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:07,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:49:07,725 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) [2021-08-21 12:49:07,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-21 12:49:08,175 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:49:08,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:49:08,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 12:49:08,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:49:08,938 INFO L354 Elim1Store]: treesize reduction 219, result has 4.4 percent of original size [2021-08-21 12:49:08,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 79 treesize of output 46 [2021-08-21 12:49:08,966 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:08,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365789037] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:08,966 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:49:08,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-08-21 12:49:08,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57738754] [2021-08-21 12:49:08,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:49:08,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:49:08,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:49:08,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:49:08,967 INFO L87 Difference]: Start difference. First operand 895 states and 2187 transitions. Second operand has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:09,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:49:09,367 INFO L93 Difference]: Finished difference Result 1927 states and 4811 transitions. [2021-08-21 12:49:09,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:49:09,367 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-21 12:49:09,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:49:09,373 INFO L225 Difference]: With dead ends: 1927 [2021-08-21 12:49:09,373 INFO L226 Difference]: Without dead ends: 1839 [2021-08-21 12:49:09,373 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 369.9ms TimeCoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:49:09,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1839 states. [2021-08-21 12:49:09,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1839 to 991. [2021-08-21 12:49:09,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 991 states, 990 states have (on average 2.4434343434343435) internal successors, (2419), 990 states have internal predecessors, (2419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:09,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 2419 transitions. [2021-08-21 12:49:09,399 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 2419 transitions. Word has length 41 [2021-08-21 12:49:09,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:49:09,399 INFO L470 AbstractCegarLoop]: Abstraction has 991 states and 2419 transitions. [2021-08-21 12:49:09,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:09,399 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 2419 transitions. [2021-08-21 12:49:09,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:49:09,402 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:49:09,402 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:49:09,436 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-08-21 12:49:09,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:09,637 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:49:09,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:49:09,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1344203385, now seen corresponding path program 12 times [2021-08-21 12:49:09,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:49:09,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146713445] [2021-08-21 12:49:09,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:49:09,638 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:49:09,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:49:09,889 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:09,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:49:09,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146713445] [2021-08-21 12:49:09,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146713445] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:09,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576664632] [2021-08-21 12:49:09,890 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:49:09,890 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:09,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:49:09,891 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) [2021-08-21 12:49:09,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-21 12:49:10,476 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 12:49:10,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:49:10,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-21 12:49:10,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:49:11,243 INFO L354 Elim1Store]: treesize reduction 231, result has 4.1 percent of original size [2021-08-21 12:49:11,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 87 treesize of output 50 [2021-08-21 12:49:11,272 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:11,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576664632] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:11,273 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:49:11,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-08-21 12:49:11,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046274449] [2021-08-21 12:49:11,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:49:11,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:49:11,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:49:11,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:49:11,274 INFO L87 Difference]: Start difference. First operand 991 states and 2419 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:11,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:49:11,653 INFO L93 Difference]: Finished difference Result 1839 states and 4559 transitions. [2021-08-21 12:49:11,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:49:11,653 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-21 12:49:11,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:49:11,658 INFO L225 Difference]: With dead ends: 1839 [2021-08-21 12:49:11,658 INFO L226 Difference]: Without dead ends: 1775 [2021-08-21 12:49:11,658 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 407.9ms TimeCoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:49:11,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1775 states. [2021-08-21 12:49:11,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1775 to 991. [2021-08-21 12:49:11,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 991 states, 990 states have (on average 2.4434343434343435) internal successors, (2419), 990 states have internal predecessors, (2419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:11,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 2419 transitions. [2021-08-21 12:49:11,685 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 2419 transitions. Word has length 41 [2021-08-21 12:49:11,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:49:11,685 INFO L470 AbstractCegarLoop]: Abstraction has 991 states and 2419 transitions. [2021-08-21 12:49:11,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:11,685 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 2419 transitions. [2021-08-21 12:49:11,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:49:11,687 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:49:11,687 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:49:11,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-21 12:49:11,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:11,901 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:49:11,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:49:11,901 INFO L82 PathProgramCache]: Analyzing trace with hash 432687225, now seen corresponding path program 13 times [2021-08-21 12:49:11,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:49:11,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971100911] [2021-08-21 12:49:11,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:49:11,901 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:49:11,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:49:12,139 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:12,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:49:12,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971100911] [2021-08-21 12:49:12,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971100911] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:12,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345794811] [2021-08-21 12:49:12,139 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:49:12,139 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:12,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:49:12,149 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) [2021-08-21 12:49:12,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-21 12:49:12,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:49:12,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 12:49:12,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:49:13,396 INFO L354 Elim1Store]: treesize reduction 154, result has 4.3 percent of original size [2021-08-21 12:49:13,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 79 treesize of output 43 [2021-08-21 12:49:13,423 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:13,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345794811] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:13,423 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:49:13,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 16 [2021-08-21 12:49:13,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398150612] [2021-08-21 12:49:13,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:49:13,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:49:13,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:49:13,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:49:13,424 INFO L87 Difference]: Start difference. First operand 991 states and 2419 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:14,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:49:14,052 INFO L93 Difference]: Finished difference Result 2459 states and 5930 transitions. [2021-08-21 12:49:14,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 12:49:14,052 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-21 12:49:14,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:49:14,062 INFO L225 Difference]: With dead ends: 2459 [2021-08-21 12:49:14,062 INFO L226 Difference]: Without dead ends: 2199 [2021-08-21 12:49:14,062 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 535.2ms TimeCoverageRelationStatistics Valid=170, Invalid=886, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 12:49:14,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-08-21 12:49:14,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 1279. [2021-08-21 12:49:14,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1279 states, 1278 states have (on average 2.435837245696401) internal successors, (3113), 1278 states have internal predecessors, (3113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:14,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1279 states to 1279 states and 3113 transitions. [2021-08-21 12:49:14,090 INFO L78 Accepts]: Start accepts. Automaton has 1279 states and 3113 transitions. Word has length 41 [2021-08-21 12:49:14,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:49:14,090 INFO L470 AbstractCegarLoop]: Abstraction has 1279 states and 3113 transitions. [2021-08-21 12:49:14,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:14,091 INFO L276 IsEmpty]: Start isEmpty. Operand 1279 states and 3113 transitions. [2021-08-21 12:49:14,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:49:14,093 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:49:14,093 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:49:14,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-21 12:49:14,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:14,311 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:49:14,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:49:14,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1574040455, now seen corresponding path program 14 times [2021-08-21 12:49:14,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:49:14,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463473973] [2021-08-21 12:49:14,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:49:14,312 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:49:14,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:49:14,544 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:14,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:49:14,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463473973] [2021-08-21 12:49:14,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463473973] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:14,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984434854] [2021-08-21 12:49:14,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:49:14,545 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:14,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:49:14,546 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) [2021-08-21 12:49:14,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-21 12:49:15,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:49:15,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:49:15,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 12:49:15,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:49:15,884 INFO L354 Elim1Store]: treesize reduction 154, result has 4.3 percent of original size [2021-08-21 12:49:15,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 79 treesize of output 43 [2021-08-21 12:49:15,912 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:15,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984434854] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:15,913 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:49:15,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-08-21 12:49:15,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174538670] [2021-08-21 12:49:15,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:49:15,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:49:15,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:49:15,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:49:15,914 INFO L87 Difference]: Start difference. First operand 1279 states and 3113 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:16,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:49:16,298 INFO L93 Difference]: Finished difference Result 2543 states and 6246 transitions. [2021-08-21 12:49:16,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:49:16,299 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-21 12:49:16,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:49:16,308 INFO L225 Difference]: With dead ends: 2543 [2021-08-21 12:49:16,308 INFO L226 Difference]: Without dead ends: 2455 [2021-08-21 12:49:16,309 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 386.3ms TimeCoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:49:16,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2455 states. [2021-08-21 12:49:16,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2455 to 1439. [2021-08-21 12:49:16,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1439 states, 1438 states have (on average 2.4318497913769126) internal successors, (3497), 1438 states have internal predecessors, (3497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:16,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1439 states to 1439 states and 3497 transitions. [2021-08-21 12:49:16,349 INFO L78 Accepts]: Start accepts. Automaton has 1439 states and 3497 transitions. Word has length 41 [2021-08-21 12:49:16,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:49:16,349 INFO L470 AbstractCegarLoop]: Abstraction has 1439 states and 3497 transitions. [2021-08-21 12:49:16,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:16,349 INFO L276 IsEmpty]: Start isEmpty. Operand 1439 states and 3497 transitions. [2021-08-21 12:49:16,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:49:16,353 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:49:16,353 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:49:16,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-21 12:49:16,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:16,578 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:49:16,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:49:16,578 INFO L82 PathProgramCache]: Analyzing trace with hash -777653639, now seen corresponding path program 15 times [2021-08-21 12:49:16,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:49:16,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83864993] [2021-08-21 12:49:16,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:49:16,579 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:49:16,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:49:16,793 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:16,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:49:16,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83864993] [2021-08-21 12:49:16,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83864993] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:16,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636505618] [2021-08-21 12:49:16,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:49:16,794 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:16,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:49:16,795 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) [2021-08-21 12:49:16,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-21 12:49:17,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 12:49:17,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:49:17,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-21 12:49:17,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:49:18,165 INFO L354 Elim1Store]: treesize reduction 110, result has 2.7 percent of original size [2021-08-21 12:49:18,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 87 treesize of output 44 [2021-08-21 12:49:18,192 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:18,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636505618] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:18,193 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:49:18,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 15 [2021-08-21 12:49:18,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523343420] [2021-08-21 12:49:18,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:49:18,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:49:18,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:49:18,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:49:18,194 INFO L87 Difference]: Start difference. First operand 1439 states and 3497 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:18,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:49:18,608 INFO L93 Difference]: Finished difference Result 2643 states and 6503 transitions. [2021-08-21 12:49:18,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:49:18,609 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-21 12:49:18,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:49:18,616 INFO L225 Difference]: With dead ends: 2643 [2021-08-21 12:49:18,616 INFO L226 Difference]: Without dead ends: 2479 [2021-08-21 12:49:18,616 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 374.2ms TimeCoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:49:18,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2479 states. [2021-08-21 12:49:18,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2479 to 1535. [2021-08-21 12:49:18,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1535 states, 1534 states have (on average 2.4361147327249024) internal successors, (3737), 1534 states have internal predecessors, (3737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:18,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1535 states to 1535 states and 3737 transitions. [2021-08-21 12:49:18,646 INFO L78 Accepts]: Start accepts. Automaton has 1535 states and 3737 transitions. Word has length 41 [2021-08-21 12:49:18,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:49:18,646 INFO L470 AbstractCegarLoop]: Abstraction has 1535 states and 3737 transitions. [2021-08-21 12:49:18,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:18,646 INFO L276 IsEmpty]: Start isEmpty. Operand 1535 states and 3737 transitions. [2021-08-21 12:49:18,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:49:18,649 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:49:18,649 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:49:18,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-21 12:49:18,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:18,865 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:49:18,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:49:18,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1510585977, now seen corresponding path program 16 times [2021-08-21 12:49:18,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:49:18,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929794239] [2021-08-21 12:49:18,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:49:18,865 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:49:18,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:49:19,077 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:19,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:49:19,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929794239] [2021-08-21 12:49:19,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929794239] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:19,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72410078] [2021-08-21 12:49:19,078 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:49:19,078 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:19,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:49:19,079 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) [2021-08-21 12:49:19,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-21 12:49:19,845 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:49:19,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:49:19,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 12:49:19,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:49:20,553 INFO L354 Elim1Store]: treesize reduction 102, result has 2.9 percent of original size [2021-08-21 12:49:20,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 79 treesize of output 40 [2021-08-21 12:49:20,586 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:20,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72410078] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:20,587 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:49:20,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-08-21 12:49:20,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730709771] [2021-08-21 12:49:20,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:49:20,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:49:20,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:49:20,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:49:20,588 INFO L87 Difference]: Start difference. First operand 1535 states and 3737 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:21,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:49:21,016 INFO L93 Difference]: Finished difference Result 2743 states and 6761 transitions. [2021-08-21 12:49:21,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:49:21,017 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-21 12:49:21,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:49:21,022 INFO L225 Difference]: With dead ends: 2743 [2021-08-21 12:49:21,022 INFO L226 Difference]: Without dead ends: 2655 [2021-08-21 12:49:21,022 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 407.0ms TimeCoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:49:21,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2655 states. [2021-08-21 12:49:21,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2655 to 1471. [2021-08-21 12:49:21,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1471 states, 1470 states have (on average 2.433333333333333) internal successors, (3577), 1470 states have internal predecessors, (3577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:21,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1471 states to 1471 states and 3577 transitions. [2021-08-21 12:49:21,049 INFO L78 Accepts]: Start accepts. Automaton has 1471 states and 3577 transitions. Word has length 41 [2021-08-21 12:49:21,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:49:21,049 INFO L470 AbstractCegarLoop]: Abstraction has 1471 states and 3577 transitions. [2021-08-21 12:49:21,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:21,049 INFO L276 IsEmpty]: Start isEmpty. Operand 1471 states and 3577 transitions. [2021-08-21 12:49:21,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:49:21,051 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:49:21,052 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:49:21,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-21 12:49:21,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:21,277 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:49:21,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:49:21,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1985665145, now seen corresponding path program 17 times [2021-08-21 12:49:21,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:49:21,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630256039] [2021-08-21 12:49:21,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:49:21,278 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:49:21,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:49:21,511 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:21,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:49:21,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630256039] [2021-08-21 12:49:21,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630256039] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:21,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537579859] [2021-08-21 12:49:21,512 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:49:21,512 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:21,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:49:21,522 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) [2021-08-21 12:49:21,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-21 12:49:22,357 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:49:22,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:49:22,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 12:49:22,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:49:22,936 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-21 12:49:22,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 31 [2021-08-21 12:49:22,968 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:22,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537579859] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:22,968 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:49:22,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2021-08-21 12:49:22,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689307818] [2021-08-21 12:49:22,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:49:22,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:49:22,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:49:22,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:49:22,969 INFO L87 Difference]: Start difference. First operand 1471 states and 3577 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:23,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:49:23,336 INFO L93 Difference]: Finished difference Result 1971 states and 4797 transitions. [2021-08-21 12:49:23,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:49:23,336 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-21 12:49:23,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:49:23,341 INFO L225 Difference]: With dead ends: 1971 [2021-08-21 12:49:23,341 INFO L226 Difference]: Without dead ends: 1935 [2021-08-21 12:49:23,341 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 340.3ms TimeCoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:49:23,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1935 states. [2021-08-21 12:49:23,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1935 to 1503. [2021-08-21 12:49:23,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1503 states, 1502 states have (on average 2.4347536617842875) internal successors, (3657), 1502 states have internal predecessors, (3657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:23,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1503 states to 1503 states and 3657 transitions. [2021-08-21 12:49:23,368 INFO L78 Accepts]: Start accepts. Automaton has 1503 states and 3657 transitions. Word has length 41 [2021-08-21 12:49:23,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:49:23,368 INFO L470 AbstractCegarLoop]: Abstraction has 1503 states and 3657 transitions. [2021-08-21 12:49:23,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:23,369 INFO L276 IsEmpty]: Start isEmpty. Operand 1503 states and 3657 transitions. [2021-08-21 12:49:23,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 12:49:23,371 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:49:23,371 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:49:23,412 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-08-21 12:49:23,592 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,SelfDestructingSolverStorable23 [2021-08-21 12:49:23,593 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:49:23,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:49:23,593 INFO L82 PathProgramCache]: Analyzing trace with hash -960272133, now seen corresponding path program 18 times [2021-08-21 12:49:23,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:49:23,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116791799] [2021-08-21 12:49:23,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:49:23,593 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:49:23,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:49:23,642 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 25 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:23,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:49:23,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116791799] [2021-08-21 12:49:23,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116791799] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:23,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313362374] [2021-08-21 12:49:23,643 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:49:23,643 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:23,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:49:23,643 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) [2021-08-21 12:49:23,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-21 12:49:24,560 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 12:49:24,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:49:24,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:49:24,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:49:24,672 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:49:24,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313362374] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:24,672 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:49:24,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-21 12:49:24,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478609807] [2021-08-21 12:49:24,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:49:24,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:49:24,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:49:24,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:49:24,673 INFO L87 Difference]: Start difference. First operand 1503 states and 3657 transitions. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 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) [2021-08-21 12:49:24,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:49:24,701 INFO L93 Difference]: Finished difference Result 2419 states and 5832 transitions. [2021-08-21 12:49:24,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:49:24,701 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 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 43 [2021-08-21 12:49:24,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:49:24,706 INFO L225 Difference]: With dead ends: 2419 [2021-08-21 12:49:24,706 INFO L226 Difference]: Without dead ends: 2411 [2021-08-21 12:49:24,706 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 20.0ms TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:49:24,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2411 states. [2021-08-21 12:49:24,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2411 to 1663. [2021-08-21 12:49:24,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1663 states, 1662 states have (on average 2.450661853188929) internal successors, (4073), 1662 states have internal predecessors, (4073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:24,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1663 states to 1663 states and 4073 transitions. [2021-08-21 12:49:24,741 INFO L78 Accepts]: Start accepts. Automaton has 1663 states and 4073 transitions. Word has length 43 [2021-08-21 12:49:24,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:49:24,741 INFO L470 AbstractCegarLoop]: Abstraction has 1663 states and 4073 transitions. [2021-08-21 12:49:24,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 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) [2021-08-21 12:49:24,742 INFO L276 IsEmpty]: Start isEmpty. Operand 1663 states and 4073 transitions. [2021-08-21 12:49:24,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 12:49:24,744 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:49:24,744 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:49:24,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-21 12:49:24,968 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,SelfDestructingSolverStorable24 [2021-08-21 12:49:24,969 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:49:24,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:49:24,969 INFO L82 PathProgramCache]: Analyzing trace with hash 449040727, now seen corresponding path program 19 times [2021-08-21 12:49:24,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:49:24,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988154471] [2021-08-21 12:49:24,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:49:24,969 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:49:24,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:49:25,274 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:49:25,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:49:25,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988154471] [2021-08-21 12:49:25,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988154471] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:25,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334862928] [2021-08-21 12:49:25,275 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:49:25,275 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:25,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:49:25,276 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) [2021-08-21 12:49:25,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-21 12:49:26,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:49:26,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-21 12:49:26,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:49:27,320 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 12:49:27,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 96 treesize of output 54 [2021-08-21 12:49:27,360 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 10 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:27,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334862928] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:27,360 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:49:27,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 21 [2021-08-21 12:49:27,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421855156] [2021-08-21 12:49:27,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:49:27,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:49:27,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:49:27,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:49:27,362 INFO L87 Difference]: Start difference. First operand 1663 states and 4073 transitions. Second operand has 22 states, 22 states have (on average 3.227272727272727) internal successors, (71), 21 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) [2021-08-21 12:49:28,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:49:28,048 INFO L93 Difference]: Finished difference Result 3071 states and 7613 transitions. [2021-08-21 12:49:28,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:49:28,049 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.227272727272727) internal successors, (71), 21 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) Word has length 47 [2021-08-21 12:49:28,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:49:28,056 INFO L225 Difference]: With dead ends: 3071 [2021-08-21 12:49:28,056 INFO L226 Difference]: Without dead ends: 3007 [2021-08-21 12:49:28,056 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 604.8ms TimeCoverageRelationStatistics Valid=166, Invalid=1166, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:49:28,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3007 states. [2021-08-21 12:49:28,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3007 to 1727. [2021-08-21 12:49:28,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1727 states, 1726 states have (on average 2.4478563151796062) internal successors, (4225), 1726 states have internal predecessors, (4225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:28,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1727 states to 1727 states and 4225 transitions. [2021-08-21 12:49:28,093 INFO L78 Accepts]: Start accepts. Automaton has 1727 states and 4225 transitions. Word has length 47 [2021-08-21 12:49:28,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:49:28,094 INFO L470 AbstractCegarLoop]: Abstraction has 1727 states and 4225 transitions. [2021-08-21 12:49:28,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.227272727272727) internal successors, (71), 21 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) [2021-08-21 12:49:28,094 INFO L276 IsEmpty]: Start isEmpty. Operand 1727 states and 4225 transitions. [2021-08-21 12:49:28,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 12:49:28,096 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:49:28,096 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:49:28,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-21 12:49:28,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-08-21 12:49:28,317 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:49:28,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:49:28,317 INFO L82 PathProgramCache]: Analyzing trace with hash -2060343465, now seen corresponding path program 20 times [2021-08-21 12:49:28,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:49:28,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321110780] [2021-08-21 12:49:28,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:49:28,318 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:49:28,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:49:28,576 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:28,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:49:28,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321110780] [2021-08-21 12:49:28,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321110780] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:28,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118843271] [2021-08-21 12:49:28,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:49:28,576 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:28,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:49:28,577 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) [2021-08-21 12:49:28,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-21 12:49:29,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:49:29,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:49:29,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-21 12:49:29,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:49:30,652 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 12:49:30,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 96 treesize of output 54 [2021-08-21 12:49:30,680 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 9 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:30,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118843271] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:30,680 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:49:30,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 20 [2021-08-21 12:49:30,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008052809] [2021-08-21 12:49:30,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 12:49:30,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:49:30,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 12:49:30,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:49:30,681 INFO L87 Difference]: Start difference. First operand 1727 states and 4225 transitions. Second operand has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:31,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:49:31,284 INFO L93 Difference]: Finished difference Result 2635 states and 6469 transitions. [2021-08-21 12:49:31,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:49:31,285 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-21 12:49:31,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:49:31,290 INFO L225 Difference]: With dead ends: 2635 [2021-08-21 12:49:31,290 INFO L226 Difference]: Without dead ends: 2575 [2021-08-21 12:49:31,290 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 668.8ms TimeCoverageRelationStatistics Valid=174, Invalid=1086, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 12:49:31,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2575 states. [2021-08-21 12:49:31,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2575 to 1551. [2021-08-21 12:49:31,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1551 states, 1550 states have (on average 2.4483870967741934) internal successors, (3795), 1550 states have internal predecessors, (3795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:31,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1551 states to 1551 states and 3795 transitions. [2021-08-21 12:49:31,321 INFO L78 Accepts]: Start accepts. Automaton has 1551 states and 3795 transitions. Word has length 47 [2021-08-21 12:49:31,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:49:31,321 INFO L470 AbstractCegarLoop]: Abstraction has 1551 states and 3795 transitions. [2021-08-21 12:49:31,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:31,321 INFO L276 IsEmpty]: Start isEmpty. Operand 1551 states and 3795 transitions. [2021-08-21 12:49:31,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 12:49:31,323 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:49:31,324 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:49:31,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-21 12:49:31,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:31,549 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:49:31,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:49:31,549 INFO L82 PathProgramCache]: Analyzing trace with hash -927302825, now seen corresponding path program 21 times [2021-08-21 12:49:31,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:49:31,550 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337806192] [2021-08-21 12:49:31,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:49:31,550 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:49:31,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:49:31,804 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:31,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:49:31,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337806192] [2021-08-21 12:49:31,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337806192] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:31,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799983021] [2021-08-21 12:49:31,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:49:31,804 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:31,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:49:31,805 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) [2021-08-21 12:49:31,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-21 12:49:32,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 12:49:32,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:49:32,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-21 12:49:32,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:49:34,004 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 12:49:34,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 96 treesize of output 54 [2021-08-21 12:49:34,038 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:34,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799983021] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:34,038 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:49:34,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 21 [2021-08-21 12:49:34,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492579214] [2021-08-21 12:49:34,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:49:34,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:49:34,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:49:34,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:49:34,039 INFO L87 Difference]: Start difference. First operand 1551 states and 3795 transitions. Second operand has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:34,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:49:34,620 INFO L93 Difference]: Finished difference Result 3335 states and 8323 transitions. [2021-08-21 12:49:34,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:49:34,620 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-21 12:49:34,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:49:34,628 INFO L225 Difference]: With dead ends: 3335 [2021-08-21 12:49:34,628 INFO L226 Difference]: Without dead ends: 3247 [2021-08-21 12:49:34,629 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 572.7ms TimeCoverageRelationStatistics Valid=166, Invalid=1166, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:49:34,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3247 states. [2021-08-21 12:49:34,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3247 to 1311. [2021-08-21 12:49:34,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1311 states, 1310 states have (on average 2.469465648854962) internal successors, (3235), 1310 states have internal predecessors, (3235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:34,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1311 states to 1311 states and 3235 transitions. [2021-08-21 12:49:34,664 INFO L78 Accepts]: Start accepts. Automaton has 1311 states and 3235 transitions. Word has length 47 [2021-08-21 12:49:34,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:49:34,664 INFO L470 AbstractCegarLoop]: Abstraction has 1311 states and 3235 transitions. [2021-08-21 12:49:34,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:34,664 INFO L276 IsEmpty]: Start isEmpty. Operand 1311 states and 3235 transitions. [2021-08-21 12:49:34,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 12:49:34,666 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:49:34,666 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:49:34,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-21 12:49:34,888 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,SelfDestructingSolverStorable27 [2021-08-21 12:49:34,889 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:49:34,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:49:34,889 INFO L82 PathProgramCache]: Analyzing trace with hash -266221225, now seen corresponding path program 22 times [2021-08-21 12:49:34,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:49:34,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945699288] [2021-08-21 12:49:34,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:49:34,890 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:49:34,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:49:35,148 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:35,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:49:35,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945699288] [2021-08-21 12:49:35,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945699288] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:35,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932424352] [2021-08-21 12:49:35,149 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:49:35,149 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:35,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:49:35,149 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) [2021-08-21 12:49:35,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-21 12:49:36,326 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:49:36,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:49:36,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-21 12:49:36,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:49:37,323 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 12:49:37,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 96 treesize of output 54 [2021-08-21 12:49:37,371 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 9 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:37,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932424352] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:37,371 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:49:37,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 21 [2021-08-21 12:49:37,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756455329] [2021-08-21 12:49:37,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:49:37,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:49:37,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:49:37,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:49:37,372 INFO L87 Difference]: Start difference. First operand 1311 states and 3235 transitions. Second operand has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:37,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:49:37,942 INFO L93 Difference]: Finished difference Result 2791 states and 6885 transitions. [2021-08-21 12:49:37,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:49:37,942 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-21 12:49:37,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:49:37,946 INFO L225 Difference]: With dead ends: 2791 [2021-08-21 12:49:37,946 INFO L226 Difference]: Without dead ends: 2527 [2021-08-21 12:49:37,947 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 610.6ms TimeCoverageRelationStatistics Valid=174, Invalid=1158, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:49:37,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2527 states. [2021-08-21 12:49:37,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2527 to 1519. [2021-08-21 12:49:37,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1519 states, 1518 states have (on average 2.463109354413702) internal successors, (3739), 1518 states have internal predecessors, (3739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:37,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1519 states to 1519 states and 3739 transitions. [2021-08-21 12:49:37,990 INFO L78 Accepts]: Start accepts. Automaton has 1519 states and 3739 transitions. Word has length 47 [2021-08-21 12:49:37,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:49:37,990 INFO L470 AbstractCegarLoop]: Abstraction has 1519 states and 3739 transitions. [2021-08-21 12:49:37,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:37,990 INFO L276 IsEmpty]: Start isEmpty. Operand 1519 states and 3739 transitions. [2021-08-21 12:49:37,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 12:49:37,992 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:49:37,992 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:49:38,018 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-08-21 12:49:38,208 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,SelfDestructingSolverStorable28 [2021-08-21 12:49:38,209 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:49:38,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:49:38,209 INFO L82 PathProgramCache]: Analyzing trace with hash 866819415, now seen corresponding path program 23 times [2021-08-21 12:49:38,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:49:38,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387915872] [2021-08-21 12:49:38,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:49:38,209 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:49:38,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:49:38,493 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:38,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:49:38,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387915872] [2021-08-21 12:49:38,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387915872] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:38,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506718246] [2021-08-21 12:49:38,493 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:49:38,493 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:38,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:49:38,495 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) [2021-08-21 12:49:38,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-21 12:49:39,750 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 12:49:39,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:49:39,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-21 12:49:39,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:49:40,798 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 12:49:40,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 96 treesize of output 54 [2021-08-21 12:49:40,826 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:40,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506718246] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:40,826 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:49:40,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-08-21 12:49:40,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009524450] [2021-08-21 12:49:40,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:49:40,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:49:40,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:49:40,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:49:40,828 INFO L87 Difference]: Start difference. First operand 1519 states and 3739 transitions. Second operand has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:41,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:49:41,412 INFO L93 Difference]: Finished difference Result 3095 states and 7747 transitions. [2021-08-21 12:49:41,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:49:41,413 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-21 12:49:41,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:49:41,416 INFO L225 Difference]: With dead ends: 3095 [2021-08-21 12:49:41,416 INFO L226 Difference]: Without dead ends: 3007 [2021-08-21 12:49:41,416 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 595.9ms TimeCoverageRelationStatistics Valid=172, Invalid=1234, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 12:49:41,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3007 states. [2021-08-21 12:49:41,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3007 to 1343. [2021-08-21 12:49:41,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1343 states, 1342 states have (on average 2.470193740685544) internal successors, (3315), 1342 states have internal predecessors, (3315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:41,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1343 states to 1343 states and 3315 transitions. [2021-08-21 12:49:41,437 INFO L78 Accepts]: Start accepts. Automaton has 1343 states and 3315 transitions. Word has length 47 [2021-08-21 12:49:41,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:49:41,438 INFO L470 AbstractCegarLoop]: Abstraction has 1343 states and 3315 transitions. [2021-08-21 12:49:41,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:41,438 INFO L276 IsEmpty]: Start isEmpty. Operand 1343 states and 3315 transitions. [2021-08-21 12:49:41,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 12:49:41,440 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:49:41,440 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:49:41,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-21 12:49:41,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:41,658 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:49:41,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:49:41,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1343535273, now seen corresponding path program 24 times [2021-08-21 12:49:41,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:49:41,658 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920289051] [2021-08-21 12:49:41,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:49:41,659 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:49:41,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:49:41,968 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:41,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:49:41,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920289051] [2021-08-21 12:49:41,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920289051] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:41,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461289614] [2021-08-21 12:49:41,968 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:49:41,968 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:41,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:49:41,969 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) [2021-08-21 12:49:41,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-21 12:49:43,389 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 12:49:43,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:49:43,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-21 12:49:43,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:49:44,416 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 12:49:44,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 96 treesize of output 54 [2021-08-21 12:49:44,442 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:44,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461289614] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:44,443 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:49:44,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-08-21 12:49:44,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335991353] [2021-08-21 12:49:44,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:49:44,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:49:44,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:49:44,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:49:44,444 INFO L87 Difference]: Start difference. First operand 1343 states and 3315 transitions. Second operand has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:44,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:49:44,967 INFO L93 Difference]: Finished difference Result 2135 states and 5307 transitions. [2021-08-21 12:49:44,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:49:44,968 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-21 12:49:44,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:49:44,970 INFO L225 Difference]: With dead ends: 2135 [2021-08-21 12:49:44,970 INFO L226 Difference]: Without dead ends: 2095 [2021-08-21 12:49:44,970 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 595.5ms TimeCoverageRelationStatistics Valid=152, Invalid=1038, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:49:44,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2095 states. [2021-08-21 12:49:44,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2095 to 1375. [2021-08-21 12:49:44,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1375 states, 1374 states have (on average 2.470887918486172) internal successors, (3395), 1374 states have internal predecessors, (3395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:44,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1375 states to 1375 states and 3395 transitions. [2021-08-21 12:49:44,990 INFO L78 Accepts]: Start accepts. Automaton has 1375 states and 3395 transitions. Word has length 47 [2021-08-21 12:49:44,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:49:44,990 INFO L470 AbstractCegarLoop]: Abstraction has 1375 states and 3395 transitions. [2021-08-21 12:49:44,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:44,991 INFO L276 IsEmpty]: Start isEmpty. Operand 1375 states and 3395 transitions. [2021-08-21 12:49:44,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 12:49:44,993 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:49:44,993 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:49:45,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-21 12:49:45,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:45,213 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:49:45,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:49:45,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1902581417, now seen corresponding path program 25 times [2021-08-21 12:49:45,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:49:45,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891929387] [2021-08-21 12:49:45,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:49:45,213 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:49:45,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:49:45,544 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:45,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:49:45,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891929387] [2021-08-21 12:49:45,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891929387] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:45,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842669868] [2021-08-21 12:49:45,545 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:49:45,545 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:45,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:49:45,546 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) [2021-08-21 12:49:45,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-21 12:49:46,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:49:46,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-21 12:49:46,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:49:47,912 INFO L354 Elim1Store]: treesize reduction 299, result has 3.2 percent of original size [2021-08-21 12:49:47,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 96 treesize of output 51 [2021-08-21 12:49:47,939 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:47,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842669868] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:47,939 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:49:47,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-08-21 12:49:47,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167444412] [2021-08-21 12:49:47,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:49:47,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:49:47,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:49:47,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:49:47,940 INFO L87 Difference]: Start difference. First operand 1375 states and 3395 transitions. Second operand has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:48,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:49:48,651 INFO L93 Difference]: Finished difference Result 3047 states and 7643 transitions. [2021-08-21 12:49:48,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 12:49:48,651 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-21 12:49:48,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:49:48,656 INFO L225 Difference]: With dead ends: 3047 [2021-08-21 12:49:48,656 INFO L226 Difference]: Without dead ends: 2959 [2021-08-21 12:49:48,656 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 706.8ms TimeCoverageRelationStatistics Valid=202, Invalid=1438, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 12:49:48,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2959 states. [2021-08-21 12:49:48,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2959 to 1183. [2021-08-21 12:49:48,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1183 states, 1182 states have (on average 2.4864636209813873) internal successors, (2939), 1182 states have internal predecessors, (2939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:48,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1183 states to 1183 states and 2939 transitions. [2021-08-21 12:49:48,680 INFO L78 Accepts]: Start accepts. Automaton has 1183 states and 2939 transitions. Word has length 47 [2021-08-21 12:49:48,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:49:48,680 INFO L470 AbstractCegarLoop]: Abstraction has 1183 states and 2939 transitions. [2021-08-21 12:49:48,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:48,680 INFO L276 IsEmpty]: Start isEmpty. Operand 1183 states and 2939 transitions. [2021-08-21 12:49:48,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 12:49:48,682 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:49:48,682 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:49:48,709 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-08-21 12:49:48,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:48,899 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:49:48,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:49:48,899 INFO L82 PathProgramCache]: Analyzing trace with hash 574804311, now seen corresponding path program 26 times [2021-08-21 12:49:48,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:49:48,899 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24730751] [2021-08-21 12:49:48,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:49:48,900 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:49:48,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:49:49,208 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:49,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:49:49,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24730751] [2021-08-21 12:49:49,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24730751] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:49,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890062113] [2021-08-21 12:49:49,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:49:49,209 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:49,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:49:49,210 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) [2021-08-21 12:49:49,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-21 12:49:50,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:49:50,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:49:50,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-21 12:49:50,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:49:51,638 INFO L354 Elim1Store]: treesize reduction 222, result has 3.1 percent of original size [2021-08-21 12:49:51,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 96 treesize of output 48 [2021-08-21 12:49:51,682 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 9 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:51,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890062113] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:51,682 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:49:51,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 19 [2021-08-21 12:49:51,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580126322] [2021-08-21 12:49:51,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 12:49:51,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:49:51,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 12:49:51,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:49:51,683 INFO L87 Difference]: Start difference. First operand 1183 states and 2939 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:52,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:49:52,460 INFO L93 Difference]: Finished difference Result 2915 states and 7139 transitions. [2021-08-21 12:49:52,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:49:52,460 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-21 12:49:52,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:49:52,463 INFO L225 Difference]: With dead ends: 2915 [2021-08-21 12:49:52,463 INFO L226 Difference]: Without dead ends: 2607 [2021-08-21 12:49:52,464 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 708.8ms TimeCoverageRelationStatistics Valid=186, Invalid=1220, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 12:49:52,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2607 states. [2021-08-21 12:49:52,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2607 to 1455. [2021-08-21 12:49:52,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1455 states, 1454 states have (on average 2.466987620357634) internal successors, (3587), 1454 states have internal predecessors, (3587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:52,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1455 states to 1455 states and 3587 transitions. [2021-08-21 12:49:52,482 INFO L78 Accepts]: Start accepts. Automaton has 1455 states and 3587 transitions. Word has length 47 [2021-08-21 12:49:52,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:49:52,482 INFO L470 AbstractCegarLoop]: Abstraction has 1455 states and 3587 transitions. [2021-08-21 12:49:52,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:52,483 INFO L276 IsEmpty]: Start isEmpty. Operand 1455 states and 3587 transitions. [2021-08-21 12:49:52,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 12:49:52,485 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:49:52,485 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:49:52,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-21 12:49:52,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:52,711 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:49:52,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:49:52,712 INFO L82 PathProgramCache]: Analyzing trace with hash -641493673, now seen corresponding path program 27 times [2021-08-21 12:49:52,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:49:52,712 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944394430] [2021-08-21 12:49:52,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:49:52,712 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:49:52,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:49:52,983 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:52,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:49:52,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944394430] [2021-08-21 12:49:52,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944394430] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:52,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077242017] [2021-08-21 12:49:52,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:49:52,983 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:52,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:49:52,985 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) [2021-08-21 12:49:52,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-21 12:49:54,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 12:49:54,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:49:54,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-21 12:49:54,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:49:55,684 INFO L354 Elim1Store]: treesize reduction 299, result has 3.2 percent of original size [2021-08-21 12:49:55,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 112 treesize of output 65 [2021-08-21 12:49:55,710 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:55,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077242017] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:55,711 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:49:55,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 20 [2021-08-21 12:49:55,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622356097] [2021-08-21 12:49:55,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 12:49:55,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:49:55,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 12:49:55,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:49:55,712 INFO L87 Difference]: Start difference. First operand 1455 states and 3587 transitions. Second operand has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:56,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:49:56,749 INFO L93 Difference]: Finished difference Result 2959 states and 7249 transitions. [2021-08-21 12:49:56,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 12:49:56,750 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-21 12:49:56,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:49:56,753 INFO L225 Difference]: With dead ends: 2959 [2021-08-21 12:49:56,753 INFO L226 Difference]: Without dead ends: 2687 [2021-08-21 12:49:56,754 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 765.6ms TimeCoverageRelationStatistics Valid=159, Invalid=1173, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:49:56,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2687 states. [2021-08-21 12:49:56,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2687 to 1455. [2021-08-21 12:49:56,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1455 states, 1454 states have (on average 2.4779917469050896) internal successors, (3603), 1454 states have internal predecessors, (3603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:56,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1455 states to 1455 states and 3603 transitions. [2021-08-21 12:49:56,771 INFO L78 Accepts]: Start accepts. Automaton has 1455 states and 3603 transitions. Word has length 47 [2021-08-21 12:49:56,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:49:56,771 INFO L470 AbstractCegarLoop]: Abstraction has 1455 states and 3603 transitions. [2021-08-21 12:49:56,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:56,771 INFO L276 IsEmpty]: Start isEmpty. Operand 1455 states and 3603 transitions. [2021-08-21 12:49:56,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 12:49:56,774 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:49:56,774 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:49:56,794 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-08-21 12:49:56,974 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,SelfDestructingSolverStorable33 [2021-08-21 12:49:56,974 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:49:56,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:49:56,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1718807721, now seen corresponding path program 28 times [2021-08-21 12:49:56,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:49:56,975 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957561395] [2021-08-21 12:49:56,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:49:56,975 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:49:56,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:49:57,249 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:57,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:49:57,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957561395] [2021-08-21 12:49:57,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957561395] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:57,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220473051] [2021-08-21 12:49:57,249 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:49:57,249 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:57,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:49:57,250 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) [2021-08-21 12:49:57,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-21 12:49:58,938 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:49:58,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:49:58,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-21 12:49:58,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:49:59,855 INFO L354 Elim1Store]: treesize reduction 222, result has 3.1 percent of original size [2021-08-21 12:49:59,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 96 treesize of output 48 [2021-08-21 12:49:59,881 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:59,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220473051] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:59,881 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:49:59,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-08-21 12:49:59,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713757588] [2021-08-21 12:49:59,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 12:49:59,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:49:59,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 12:49:59,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:49:59,882 INFO L87 Difference]: Start difference. First operand 1455 states and 3603 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:00,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:50:00,545 INFO L93 Difference]: Finished difference Result 3239 states and 8155 transitions. [2021-08-21 12:50:00,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:50:00,545 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-21 12:50:00,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:50:00,549 INFO L225 Difference]: With dead ends: 3239 [2021-08-21 12:50:00,549 INFO L226 Difference]: Without dead ends: 3103 [2021-08-21 12:50:00,549 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 562.1ms TimeCoverageRelationStatistics Valid=166, Invalid=1094, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 12:50:00,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3103 states. [2021-08-21 12:50:00,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3103 to 1519. [2021-08-21 12:50:00,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1519 states, 1518 states have (on average 2.478919631093544) internal successors, (3763), 1518 states have internal predecessors, (3763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:00,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1519 states to 1519 states and 3763 transitions. [2021-08-21 12:50:00,572 INFO L78 Accepts]: Start accepts. Automaton has 1519 states and 3763 transitions. Word has length 47 [2021-08-21 12:50:00,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:50:00,573 INFO L470 AbstractCegarLoop]: Abstraction has 1519 states and 3763 transitions. [2021-08-21 12:50:00,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:00,573 INFO L276 IsEmpty]: Start isEmpty. Operand 1519 states and 3763 transitions. [2021-08-21 12:50:00,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 12:50:00,575 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:50:00,575 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:50:00,609 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-08-21 12:50:00,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:50:00,789 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:50:00,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:50:00,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1228093271, now seen corresponding path program 29 times [2021-08-21 12:50:00,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:50:00,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506507628] [2021-08-21 12:50:00,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:50:00,789 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:50:00,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:50:01,053 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:01,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:50:01,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506507628] [2021-08-21 12:50:01,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506507628] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:01,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965654108] [2021-08-21 12:50:01,054 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:50:01,054 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:50:01,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:50:01,056 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) [2021-08-21 12:50:01,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-21 12:50:02,855 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 12:50:02,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:50:02,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-21 12:50:02,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:50:03,723 INFO L354 Elim1Store]: treesize reduction 158, result has 1.9 percent of original size [2021-08-21 12:50:03,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 96 treesize of output 45 [2021-08-21 12:50:03,750 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 9 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:03,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965654108] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:03,750 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:50:03,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 18 [2021-08-21 12:50:03,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837738524] [2021-08-21 12:50:03,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:50:03,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:50:03,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:50:03,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:50:03,751 INFO L87 Difference]: Start difference. First operand 1519 states and 3763 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:04,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:50:04,596 INFO L93 Difference]: Finished difference Result 3159 states and 7761 transitions. [2021-08-21 12:50:04,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:50:04,596 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-21 12:50:04,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:50:04,600 INFO L225 Difference]: With dead ends: 3159 [2021-08-21 12:50:04,600 INFO L226 Difference]: Without dead ends: 2847 [2021-08-21 12:50:04,600 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 710.8ms TimeCoverageRelationStatistics Valid=179, Invalid=1153, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:50:04,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2847 states. [2021-08-21 12:50:04,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2847 to 1807. [2021-08-21 12:50:04,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1807 states, 1806 states have (on average 2.4689922480620154) internal successors, (4459), 1806 states have internal predecessors, (4459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:04,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1807 states to 1807 states and 4459 transitions. [2021-08-21 12:50:04,623 INFO L78 Accepts]: Start accepts. Automaton has 1807 states and 4459 transitions. Word has length 47 [2021-08-21 12:50:04,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:50:04,623 INFO L470 AbstractCegarLoop]: Abstraction has 1807 states and 4459 transitions. [2021-08-21 12:50:04,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:04,623 INFO L276 IsEmpty]: Start isEmpty. Operand 1807 states and 4459 transitions. [2021-08-21 12:50:04,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 12:50:04,626 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:50:04,626 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:50:04,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-08-21 12:50:04,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:50:04,841 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:50:04,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:50:04,841 INFO L82 PathProgramCache]: Analyzing trace with hash -2074549929, now seen corresponding path program 30 times [2021-08-21 12:50:04,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:50:04,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768973871] [2021-08-21 12:50:04,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:50:04,841 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:50:04,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:50:05,157 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:05,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:50:05,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768973871] [2021-08-21 12:50:05,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768973871] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:05,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235046545] [2021-08-21 12:50:05,158 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:50:05,158 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:50:05,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:50:05,159 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) [2021-08-21 12:50:05,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-21 12:50:07,171 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 12:50:07,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:50:07,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-21 12:50:07,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:50:08,448 INFO L354 Elim1Store]: treesize reduction 372, result has 3.4 percent of original size [2021-08-21 12:50:08,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 104 treesize of output 68 [2021-08-21 12:50:08,492 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:08,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235046545] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:08,493 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:50:08,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 18 [2021-08-21 12:50:08,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143722988] [2021-08-21 12:50:08,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:50:08,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:50:08,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:50:08,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:50:08,494 INFO L87 Difference]: Start difference. First operand 1807 states and 4459 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:09,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:50:09,736 INFO L93 Difference]: Finished difference Result 3967 states and 9839 transitions. [2021-08-21 12:50:09,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:50:09,736 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-21 12:50:09,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:50:09,741 INFO L225 Difference]: With dead ends: 3967 [2021-08-21 12:50:09,741 INFO L226 Difference]: Without dead ends: 3727 [2021-08-21 12:50:09,741 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 805.4ms TimeCoverageRelationStatistics Valid=164, Invalid=1168, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:50:09,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3727 states. [2021-08-21 12:50:09,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3727 to 1791. [2021-08-21 12:50:09,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1791 states, 1790 states have (on average 2.4687150837988825) internal successors, (4419), 1790 states have internal predecessors, (4419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:09,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1791 states to 1791 states and 4419 transitions. [2021-08-21 12:50:09,773 INFO L78 Accepts]: Start accepts. Automaton has 1791 states and 4419 transitions. Word has length 47 [2021-08-21 12:50:09,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:50:09,773 INFO L470 AbstractCegarLoop]: Abstraction has 1791 states and 4419 transitions. [2021-08-21 12:50:09,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:09,773 INFO L276 IsEmpty]: Start isEmpty. Operand 1791 states and 4419 transitions. [2021-08-21 12:50:09,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 12:50:09,776 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:50:09,776 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:50:09,804 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-08-21 12:50:09,992 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,SelfDestructingSolverStorable36 [2021-08-21 12:50:09,993 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:50:09,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:50:09,993 INFO L82 PathProgramCache]: Analyzing trace with hash 150779223, now seen corresponding path program 31 times [2021-08-21 12:50:09,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:50:09,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722690837] [2021-08-21 12:50:09,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:50:09,994 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:50:10,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:50:10,330 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:10,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:50:10,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722690837] [2021-08-21 12:50:10,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722690837] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:10,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743228522] [2021-08-21 12:50:10,331 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:50:10,331 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:50:10,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:50:10,337 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) [2021-08-21 12:50:10,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-21 12:50:12,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:50:12,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-21 12:50:12,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:50:13,335 INFO L354 Elim1Store]: treesize reduction 158, result has 1.9 percent of original size [2021-08-21 12:50:13,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 96 treesize of output 45 [2021-08-21 12:50:13,361 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:13,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743228522] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:13,362 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:50:13,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-08-21 12:50:13,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102976426] [2021-08-21 12:50:13,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 12:50:13,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:50:13,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 12:50:13,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:50:13,363 INFO L87 Difference]: Start difference. First operand 1791 states and 4419 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:13,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:50:13,882 INFO L93 Difference]: Finished difference Result 3719 states and 9259 transitions. [2021-08-21 12:50:13,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:50:13,883 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-21 12:50:13,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:50:13,887 INFO L225 Difference]: With dead ends: 3719 [2021-08-21 12:50:13,888 INFO L226 Difference]: Without dead ends: 3631 [2021-08-21 12:50:13,888 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 588.2ms TimeCoverageRelationStatistics Valid=160, Invalid=1030, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:50:13,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3631 states. [2021-08-21 12:50:13,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3631 to 1679. [2021-08-21 12:50:13,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1679 states, 1678 states have (on average 2.466626936829559) internal successors, (4139), 1678 states have internal predecessors, (4139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:13,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1679 states to 1679 states and 4139 transitions. [2021-08-21 12:50:13,911 INFO L78 Accepts]: Start accepts. Automaton has 1679 states and 4139 transitions. Word has length 47 [2021-08-21 12:50:13,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:50:13,911 INFO L470 AbstractCegarLoop]: Abstraction has 1679 states and 4139 transitions. [2021-08-21 12:50:13,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:13,911 INFO L276 IsEmpty]: Start isEmpty. Operand 1679 states and 4139 transitions. [2021-08-21 12:50:13,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 12:50:13,913 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:50:13,913 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:50:13,934 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-08-21 12:50:14,113 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,SelfDestructingSolverStorable37 [2021-08-21 12:50:14,114 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:50:14,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:50:14,114 INFO L82 PathProgramCache]: Analyzing trace with hash 2008735575, now seen corresponding path program 32 times [2021-08-21 12:50:14,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:50:14,114 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725035402] [2021-08-21 12:50:14,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:50:14,114 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:50:14,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:50:14,414 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:14,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:50:14,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725035402] [2021-08-21 12:50:14,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725035402] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:14,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141290923] [2021-08-21 12:50:14,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:50:14,415 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:50:14,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:50:14,415 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) [2021-08-21 12:50:14,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-21 12:50:16,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:50:16,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:50:16,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-21 12:50:16,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:50:17,308 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-08-21 12:50:17,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 90 treesize of output 36 [2021-08-21 12:50:17,334 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:17,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141290923] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:17,334 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:50:17,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-08-21 12:50:17,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984861281] [2021-08-21 12:50:17,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:50:17,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:50:17,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:50:17,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:50:17,336 INFO L87 Difference]: Start difference. First operand 1679 states and 4139 transitions. Second operand has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:17,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:50:17,871 INFO L93 Difference]: Finished difference Result 2611 states and 6439 transitions. [2021-08-21 12:50:17,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:50:17,885 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-21 12:50:17,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:50:17,888 INFO L225 Difference]: With dead ends: 2611 [2021-08-21 12:50:17,888 INFO L226 Difference]: Without dead ends: 2575 [2021-08-21 12:50:17,889 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 499.5ms TimeCoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 12:50:17,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2575 states. [2021-08-21 12:50:17,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2575 to 1711. [2021-08-21 12:50:17,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1711 states, 1710 states have (on average 2.467251461988304) internal successors, (4219), 1710 states have internal predecessors, (4219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:17,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1711 states to 1711 states and 4219 transitions. [2021-08-21 12:50:17,914 INFO L78 Accepts]: Start accepts. Automaton has 1711 states and 4219 transitions. Word has length 47 [2021-08-21 12:50:17,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:50:17,915 INFO L470 AbstractCegarLoop]: Abstraction has 1711 states and 4219 transitions. [2021-08-21 12:50:17,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:17,915 INFO L276 IsEmpty]: Start isEmpty. Operand 1711 states and 4219 transitions. [2021-08-21 12:50:17,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-21 12:50:17,917 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:50:17,917 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:50:17,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-08-21 12:50:18,136 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,SelfDestructingSolverStorable38 [2021-08-21 12:50:18,137 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:50:18,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:50:18,137 INFO L82 PathProgramCache]: Analyzing trace with hash -264425383, now seen corresponding path program 33 times [2021-08-21 12:50:18,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:50:18,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947489759] [2021-08-21 12:50:18,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:50:18,137 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:50:18,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:50:18,198 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 36 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:18,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:50:18,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947489759] [2021-08-21 12:50:18,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947489759] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:18,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56894507] [2021-08-21 12:50:18,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:50:18,199 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:50:18,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:50:18,213 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) [2021-08-21 12:50:18,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-21 12:50:20,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 12:50:20,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:50:20,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:50:20,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:50:20,589 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 36 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:50:20,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56894507] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:20,589 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:50:20,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-21 12:50:20,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597968932] [2021-08-21 12:50:20,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:50:20,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:50:20,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:50:20,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:50:20,590 INFO L87 Difference]: Start difference. First operand 1711 states and 4219 transitions. Second operand has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 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) [2021-08-21 12:50:20,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:50:20,622 INFO L93 Difference]: Finished difference Result 2791 states and 6789 transitions. [2021-08-21 12:50:20,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:50:20,623 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 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) Word has length 49 [2021-08-21 12:50:20,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:50:20,626 INFO L225 Difference]: With dead ends: 2791 [2021-08-21 12:50:20,626 INFO L226 Difference]: Without dead ends: 2783 [2021-08-21 12:50:20,626 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 27.1ms TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:50:20,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2783 states. [2021-08-21 12:50:20,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2783 to 1871. [2021-08-21 12:50:20,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1871 states, 1870 states have (on average 2.478609625668449) internal successors, (4635), 1870 states have internal predecessors, (4635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:20,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1871 states to 1871 states and 4635 transitions. [2021-08-21 12:50:20,646 INFO L78 Accepts]: Start accepts. Automaton has 1871 states and 4635 transitions. Word has length 49 [2021-08-21 12:50:20,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:50:20,646 INFO L470 AbstractCegarLoop]: Abstraction has 1871 states and 4635 transitions. [2021-08-21 12:50:20,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 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) [2021-08-21 12:50:20,646 INFO L276 IsEmpty]: Start isEmpty. Operand 1871 states and 4635 transitions. [2021-08-21 12:50:20,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-21 12:50:20,648 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:50:20,648 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:50:20,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-08-21 12:50:20,848 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,SelfDestructingSolverStorable39 [2021-08-21 12:50:20,849 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:50:20,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:50:20,849 INFO L82 PathProgramCache]: Analyzing trace with hash 512651733, now seen corresponding path program 34 times [2021-08-21 12:50:20,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:50:20,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060542457] [2021-08-21 12:50:20,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:50:20,849 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:50:20,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:50:21,224 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:21,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:50:21,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060542457] [2021-08-21 12:50:21,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060542457] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:21,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941232169] [2021-08-21 12:50:21,224 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:50:21,224 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:50:21,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:50:21,225 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) [2021-08-21 12:50:21,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-21 12:50:23,462 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:50:23,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:50:23,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 52 conjunts are in the unsatisfiable core [2021-08-21 12:50:23,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:50:24,819 INFO L354 Elim1Store]: treesize reduction 625, result has 2.5 percent of original size [2021-08-21 12:50:24,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 123 treesize of output 68 [2021-08-21 12:50:24,846 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:24,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941232169] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:24,846 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:50:24,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 25 [2021-08-21 12:50:24,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034468079] [2021-08-21 12:50:24,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 12:50:24,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:50:24,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 12:50:24,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:50:24,847 INFO L87 Difference]: Start difference. First operand 1871 states and 4635 transitions. Second operand has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:25,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:50:25,752 INFO L93 Difference]: Finished difference Result 5431 states and 13643 transitions. [2021-08-21 12:50:25,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 12:50:25,753 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-08-21 12:50:25,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:50:25,759 INFO L225 Difference]: With dead ends: 5431 [2021-08-21 12:50:25,759 INFO L226 Difference]: Without dead ends: 5295 [2021-08-21 12:50:25,759 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 840.3ms TimeCoverageRelationStatistics Valid=222, Invalid=1758, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 12:50:25,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5295 states. [2021-08-21 12:50:25,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5295 to 2415. [2021-08-21 12:50:25,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2415 states, 2414 states have (on average 2.4701739850869924) internal successors, (5963), 2414 states have internal predecessors, (5963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:25,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2415 states to 2415 states and 5963 transitions. [2021-08-21 12:50:25,791 INFO L78 Accepts]: Start accepts. Automaton has 2415 states and 5963 transitions. Word has length 53 [2021-08-21 12:50:25,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:50:25,791 INFO L470 AbstractCegarLoop]: Abstraction has 2415 states and 5963 transitions. [2021-08-21 12:50:25,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:25,791 INFO L276 IsEmpty]: Start isEmpty. Operand 2415 states and 5963 transitions. [2021-08-21 12:50:25,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-21 12:50:25,794 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:50:25,794 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:50:25,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-08-21 12:50:25,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:50:25,994 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:50:25,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:50:25,995 INFO L82 PathProgramCache]: Analyzing trace with hash 693965781, now seen corresponding path program 35 times [2021-08-21 12:50:25,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:50:25,995 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634093448] [2021-08-21 12:50:25,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:50:25,995 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:50:26,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:50:26,371 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:26,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:50:26,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634093448] [2021-08-21 12:50:26,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634093448] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:26,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301979270] [2021-08-21 12:50:26,371 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:50:26,371 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:50:26,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:50:26,372 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) [2021-08-21 12:50:26,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-21 12:50:28,732 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 12:50:28,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:50:28,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 12:50:28,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:50:30,138 INFO L354 Elim1Store]: treesize reduction 605, result has 2.6 percent of original size [2021-08-21 12:50:30,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 115 treesize of output 64 [2021-08-21 12:50:30,164 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:30,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301979270] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:30,165 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:50:30,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 26 [2021-08-21 12:50:30,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258428075] [2021-08-21 12:50:30,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 12:50:30,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:50:30,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 12:50:30,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:50:30,166 INFO L87 Difference]: Start difference. First operand 2415 states and 5963 transitions. Second operand has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 26 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:31,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:50:31,049 INFO L93 Difference]: Finished difference Result 5495 states and 13819 transitions. [2021-08-21 12:50:31,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 12:50:31,049 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 26 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-08-21 12:50:31,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:50:31,056 INFO L225 Difference]: With dead ends: 5495 [2021-08-21 12:50:31,056 INFO L226 Difference]: Without dead ends: 5359 [2021-08-21 12:50:31,056 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 875.8ms TimeCoverageRelationStatistics Valid=228, Invalid=1842, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 12:50:31,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5359 states. [2021-08-21 12:50:31,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5359 to 1967. [2021-08-21 12:50:31,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1967 states, 1966 states have (on average 2.4796541200406916) internal successors, (4875), 1966 states have internal predecessors, (4875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:31,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1967 states to 1967 states and 4875 transitions. [2021-08-21 12:50:31,088 INFO L78 Accepts]: Start accepts. Automaton has 1967 states and 4875 transitions. Word has length 53 [2021-08-21 12:50:31,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:50:31,088 INFO L470 AbstractCegarLoop]: Abstraction has 1967 states and 4875 transitions. [2021-08-21 12:50:31,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 26 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:31,088 INFO L276 IsEmpty]: Start isEmpty. Operand 1967 states and 4875 transitions. [2021-08-21 12:50:31,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-21 12:50:31,090 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:50:31,091 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:50:31,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-08-21 12:50:31,291 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,SelfDestructingSolverStorable41 [2021-08-21 12:50:31,291 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:50:31,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:50:31,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1270786091, now seen corresponding path program 36 times [2021-08-21 12:50:31,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:50:31,292 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926235454] [2021-08-21 12:50:31,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:50:31,292 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:50:31,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:50:31,604 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 86 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:50:31,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:50:31,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926235454] [2021-08-21 12:50:31,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926235454] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:31,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825442371] [2021-08-21 12:50:31,604 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:50:31,604 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:50:31,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:50:31,605 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) [2021-08-21 12:50:31,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-21 12:50:34,018 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 12:50:34,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:50:34,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 12:50:34,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:50:36,099 INFO L354 Elim1Store]: treesize reduction 585, result has 2.7 percent of original size [2021-08-21 12:50:36,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 127 treesize of output 78 [2021-08-21 12:50:36,128 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 11 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:36,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825442371] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:36,129 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:50:36,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 24 [2021-08-21 12:50:36,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421644822] [2021-08-21 12:50:36,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 12:50:36,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:50:36,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 12:50:36,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:50:36,130 INFO L87 Difference]: Start difference. First operand 1967 states and 4875 transitions. Second operand has 25 states, 25 states have (on average 3.36) internal successors, (84), 24 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:38,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:50:38,082 INFO L93 Difference]: Finished difference Result 3607 states and 8873 transitions. [2021-08-21 12:50:38,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:50:38,082 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.36) internal successors, (84), 24 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-08-21 12:50:38,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:50:38,087 INFO L225 Difference]: With dead ends: 3607 [2021-08-21 12:50:38,087 INFO L226 Difference]: Without dead ends: 3295 [2021-08-21 12:50:38,087 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 1204.3ms TimeCoverageRelationStatistics Valid=234, Invalid=1572, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 12:50:38,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3295 states. [2021-08-21 12:50:38,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3295 to 2367. [2021-08-21 12:50:38,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2367 states, 2366 states have (on average 2.462806424344886) internal successors, (5827), 2366 states have internal predecessors, (5827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:38,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2367 states to 2367 states and 5827 transitions. [2021-08-21 12:50:38,124 INFO L78 Accepts]: Start accepts. Automaton has 2367 states and 5827 transitions. Word has length 53 [2021-08-21 12:50:38,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:50:38,125 INFO L470 AbstractCegarLoop]: Abstraction has 2367 states and 5827 transitions. [2021-08-21 12:50:38,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.36) internal successors, (84), 24 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:38,125 INFO L276 IsEmpty]: Start isEmpty. Operand 2367 states and 5827 transitions. [2021-08-21 12:50:38,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-21 12:50:38,128 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:50:38,128 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:50:38,152 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-08-21 12:50:38,333 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,SelfDestructingSolverStorable42 [2021-08-21 12:50:38,333 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:50:38,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:50:38,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1517517269, now seen corresponding path program 37 times [2021-08-21 12:50:38,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:50:38,334 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988724693] [2021-08-21 12:50:38,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:50:38,334 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:50:38,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:50:38,664 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:38,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:50:38,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988724693] [2021-08-21 12:50:38,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988724693] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:38,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521428706] [2021-08-21 12:50:38,664 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:50:38,664 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:50:38,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:50:38,665 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) [2021-08-21 12:50:38,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-21 12:50:41,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:50:41,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 52 conjunts are in the unsatisfiable core [2021-08-21 12:50:41,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:50:42,521 INFO L354 Elim1Store]: treesize reduction 625, result has 2.5 percent of original size [2021-08-21 12:50:42,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 123 treesize of output 68 [2021-08-21 12:50:42,549 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:42,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521428706] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:42,549 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:50:42,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 24 [2021-08-21 12:50:42,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782917212] [2021-08-21 12:50:42,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 12:50:42,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:50:42,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 12:50:42,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:50:42,550 INFO L87 Difference]: Start difference. First operand 2367 states and 5827 transitions. Second operand has 25 states, 25 states have (on average 3.36) internal successors, (84), 24 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:43,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:50:43,239 INFO L93 Difference]: Finished difference Result 4807 states and 12011 transitions. [2021-08-21 12:50:43,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:50:43,239 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.36) internal successors, (84), 24 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-08-21 12:50:43,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:50:43,245 INFO L225 Difference]: With dead ends: 4807 [2021-08-21 12:50:43,245 INFO L226 Difference]: Without dead ends: 4719 [2021-08-21 12:50:43,245 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 753.3ms TimeCoverageRelationStatistics Valid=180, Invalid=1380, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 12:50:43,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4719 states. [2021-08-21 12:50:43,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4719 to 2335. [2021-08-21 12:50:43,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2335 states, 2334 states have (on average 2.4622964867180808) internal successors, (5747), 2334 states have internal predecessors, (5747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:43,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2335 states to 2335 states and 5747 transitions. [2021-08-21 12:50:43,277 INFO L78 Accepts]: Start accepts. Automaton has 2335 states and 5747 transitions. Word has length 53 [2021-08-21 12:50:43,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:50:43,277 INFO L470 AbstractCegarLoop]: Abstraction has 2335 states and 5747 transitions. [2021-08-21 12:50:43,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.36) internal successors, (84), 24 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:43,277 INFO L276 IsEmpty]: Start isEmpty. Operand 2335 states and 5747 transitions. [2021-08-21 12:50:43,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-21 12:50:43,280 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:50:43,281 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:50:43,306 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-08-21 12:50:43,485 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,SelfDestructingSolverStorable43 [2021-08-21 12:50:43,485 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:50:43,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:50:43,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1492532693, now seen corresponding path program 38 times [2021-08-21 12:50:43,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:50:43,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748281498] [2021-08-21 12:50:43,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:50:43,485 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:50:43,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:50:43,836 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:43,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:50:43,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748281498] [2021-08-21 12:50:43,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748281498] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:43,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858133034] [2021-08-21 12:50:43,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:50:43,836 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:50:43,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:50:43,837 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) [2021-08-21 12:50:43,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-21 12:50:46,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:50:46,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:50:46,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 52 conjunts are in the unsatisfiable core [2021-08-21 12:50:46,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:50:47,889 INFO L354 Elim1Store]: treesize reduction 625, result has 2.5 percent of original size [2021-08-21 12:50:47,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 123 treesize of output 68 [2021-08-21 12:50:47,915 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:47,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858133034] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:47,916 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:50:47,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 26 [2021-08-21 12:50:47,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362349804] [2021-08-21 12:50:47,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 12:50:47,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:50:47,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 12:50:47,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:50:47,917 INFO L87 Difference]: Start difference. First operand 2335 states and 5747 transitions. Second operand has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 26 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:48,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:50:48,654 INFO L93 Difference]: Finished difference Result 5271 states and 13147 transitions. [2021-08-21 12:50:48,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 12:50:48,654 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 26 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-08-21 12:50:48,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:50:48,661 INFO L225 Difference]: With dead ends: 5271 [2021-08-21 12:50:48,661 INFO L226 Difference]: Without dead ends: 5183 [2021-08-21 12:50:48,661 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 817.7ms TimeCoverageRelationStatistics Valid=201, Invalid=1605, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 12:50:48,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5183 states. [2021-08-21 12:50:48,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5183 to 2271. [2021-08-21 12:50:48,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2271 states, 2270 states have (on average 2.4612334801762112) internal successors, (5587), 2270 states have internal predecessors, (5587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:48,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2271 states to 2271 states and 5587 transitions. [2021-08-21 12:50:48,695 INFO L78 Accepts]: Start accepts. Automaton has 2271 states and 5587 transitions. Word has length 53 [2021-08-21 12:50:48,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:50:48,695 INFO L470 AbstractCegarLoop]: Abstraction has 2271 states and 5587 transitions. [2021-08-21 12:50:48,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 26 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:48,695 INFO L276 IsEmpty]: Start isEmpty. Operand 2271 states and 5587 transitions. [2021-08-21 12:50:48,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-21 12:50:48,698 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:50:48,698 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:50:48,721 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-08-21 12:50:48,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:50:48,901 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:50:48,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:50:48,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1517887531, now seen corresponding path program 39 times [2021-08-21 12:50:48,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:50:48,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116638566] [2021-08-21 12:50:48,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:50:48,901 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:50:48,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:50:49,269 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:49,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:50:49,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116638566] [2021-08-21 12:50:49,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116638566] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:49,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119760478] [2021-08-21 12:50:49,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:50:49,269 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:50:49,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:50:49,270 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) [2021-08-21 12:50:49,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-21 12:50:52,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 12:50:52,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:50:52,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 52 conjunts are in the unsatisfiable core [2021-08-21 12:50:52,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:50:53,390 INFO L354 Elim1Store]: treesize reduction 625, result has 2.5 percent of original size [2021-08-21 12:50:53,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 123 treesize of output 68 [2021-08-21 12:50:53,433 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:53,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119760478] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:53,434 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:50:53,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 26 [2021-08-21 12:50:53,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321889095] [2021-08-21 12:50:53,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 12:50:53,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:50:53,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 12:50:53,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:50:53,435 INFO L87 Difference]: Start difference. First operand 2271 states and 5587 transitions. Second operand has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 26 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:54,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:50:54,130 INFO L93 Difference]: Finished difference Result 3943 states and 9771 transitions. [2021-08-21 12:50:54,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:50:54,131 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 26 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-08-21 12:50:54,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:50:54,135 INFO L225 Difference]: With dead ends: 3943 [2021-08-21 12:50:54,135 INFO L226 Difference]: Without dead ends: 3903 [2021-08-21 12:50:54,135 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 787.0ms TimeCoverageRelationStatistics Valid=191, Invalid=1531, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 12:50:54,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3903 states. [2021-08-21 12:50:54,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3903 to 2287. [2021-08-21 12:50:54,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2287 states, 2286 states have (on average 2.4615048118985126) internal successors, (5627), 2286 states have internal predecessors, (5627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:54,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2287 states to 2287 states and 5627 transitions. [2021-08-21 12:50:54,173 INFO L78 Accepts]: Start accepts. Automaton has 2287 states and 5627 transitions. Word has length 53 [2021-08-21 12:50:54,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:50:54,173 INFO L470 AbstractCegarLoop]: Abstraction has 2287 states and 5627 transitions. [2021-08-21 12:50:54,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 26 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:54,173 INFO L276 IsEmpty]: Start isEmpty. Operand 2287 states and 5627 transitions. [2021-08-21 12:50:54,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-21 12:50:54,176 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:50:54,176 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:50:54,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-08-21 12:50:54,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:50:54,405 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:50:54,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:50:54,405 INFO L82 PathProgramCache]: Analyzing trace with hash -827491883, now seen corresponding path program 40 times [2021-08-21 12:50:54,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:50:54,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506192958] [2021-08-21 12:50:54,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:50:54,405 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:50:54,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:50:54,757 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:54,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:50:54,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506192958] [2021-08-21 12:50:54,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506192958] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:54,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594027712] [2021-08-21 12:50:54,757 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:50:54,757 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:50:54,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:50:54,758 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) [2021-08-21 12:50:54,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-21 12:50:57,616 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:50:57,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:50:57,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 50 conjunts are in the unsatisfiable core [2021-08-21 12:50:57,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:50:58,885 INFO L354 Elim1Store]: treesize reduction 492, result has 2.6 percent of original size [2021-08-21 12:50:58,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 115 treesize of output 61 [2021-08-21 12:50:58,912 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:58,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594027712] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:58,912 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:50:58,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 23 [2021-08-21 12:50:58,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784313261] [2021-08-21 12:50:58,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 12:50:58,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:50:58,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 12:50:58,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:50:58,913 INFO L87 Difference]: Start difference. First operand 2287 states and 5627 transitions. Second operand has 24 states, 24 states have (on average 3.3333333333333335) internal successors, (80), 23 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:00,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:51:00,276 INFO L93 Difference]: Finished difference Result 4971 states and 12134 transitions. [2021-08-21 12:51:00,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 12:51:00,276 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.3333333333333335) internal successors, (80), 23 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-08-21 12:51:00,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:51:00,282 INFO L225 Difference]: With dead ends: 4971 [2021-08-21 12:51:00,282 INFO L226 Difference]: Without dead ends: 4567 [2021-08-21 12:51:00,283 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 1081.8ms TimeCoverageRelationStatistics Valid=284, Invalid=2068, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 12:51:00,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4567 states. [2021-08-21 12:51:00,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4567 to 2991. [2021-08-21 12:51:00,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2991 states, 2990 states have (on average 2.4618729096989966) internal successors, (7361), 2990 states have internal predecessors, (7361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:00,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2991 states to 2991 states and 7361 transitions. [2021-08-21 12:51:00,317 INFO L78 Accepts]: Start accepts. Automaton has 2991 states and 7361 transitions. Word has length 53 [2021-08-21 12:51:00,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:51:00,317 INFO L470 AbstractCegarLoop]: Abstraction has 2991 states and 7361 transitions. [2021-08-21 12:51:00,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.3333333333333335) internal successors, (80), 23 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:00,317 INFO L276 IsEmpty]: Start isEmpty. Operand 2991 states and 7361 transitions. [2021-08-21 12:51:00,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-21 12:51:00,320 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:51:00,320 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:51:00,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-08-21 12:51:00,520 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,SelfDestructingSolverStorable46 [2021-08-21 12:51:00,521 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:51:00,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:51:00,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1935826901, now seen corresponding path program 41 times [2021-08-21 12:51:00,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:51:00,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253305185] [2021-08-21 12:51:00,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:51:00,521 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:51:00,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:51:00,932 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:51:00,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:51:00,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253305185] [2021-08-21 12:51:00,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253305185] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:00,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683683362] [2021-08-21 12:51:00,932 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:51:00,932 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:51:00,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:51:00,937 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) [2021-08-21 12:51:00,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-21 12:51:03,922 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 12:51:03,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:51:03,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 12:51:03,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:51:05,215 INFO L354 Elim1Store]: treesize reduction 730, result has 2.5 percent of original size [2021-08-21 12:51:05,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 86 treesize of output 60 [2021-08-21 12:51:05,254 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:51:05,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683683362] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:05,254 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:51:05,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2021-08-21 12:51:05,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2184864] [2021-08-21 12:51:05,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 12:51:05,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:51:05,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 12:51:05,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:51:05,255 INFO L87 Difference]: Start difference. First operand 2991 states and 7361 transitions. Second operand has 30 states, 30 states have (on average 3.2) internal successors, (96), 29 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:07,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:51:07,571 INFO L93 Difference]: Finished difference Result 6907 states and 17091 transitions. [2021-08-21 12:51:07,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 12:51:07,571 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.2) internal successors, (96), 29 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-08-21 12:51:07,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:51:07,580 INFO L225 Difference]: With dead ends: 6907 [2021-08-21 12:51:07,580 INFO L226 Difference]: Without dead ends: 6575 [2021-08-21 12:51:07,581 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 1701.9ms TimeCoverageRelationStatistics Valid=316, Invalid=2876, Unknown=0, NotChecked=0, Total=3192 [2021-08-21 12:51:07,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6575 states. [2021-08-21 12:51:07,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6575 to 3503. [2021-08-21 12:51:07,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3503 states, 3502 states have (on average 2.456025128498001) internal successors, (8601), 3502 states have internal predecessors, (8601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:07,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3503 states to 3503 states and 8601 transitions. [2021-08-21 12:51:07,651 INFO L78 Accepts]: Start accepts. Automaton has 3503 states and 8601 transitions. Word has length 53 [2021-08-21 12:51:07,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:51:07,651 INFO L470 AbstractCegarLoop]: Abstraction has 3503 states and 8601 transitions. [2021-08-21 12:51:07,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.2) internal successors, (96), 29 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:07,651 INFO L276 IsEmpty]: Start isEmpty. Operand 3503 states and 8601 transitions. [2021-08-21 12:51:07,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-21 12:51:07,657 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:51:07,657 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:51:07,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-08-21 12:51:07,881 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,SelfDestructingSolverStorable47 [2021-08-21 12:51:07,882 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:51:07,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:51:07,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1074593323, now seen corresponding path program 42 times [2021-08-21 12:51:07,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:51:07,882 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442711585] [2021-08-21 12:51:07,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:51:07,882 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:51:07,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:51:08,308 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:51:08,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:51:08,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442711585] [2021-08-21 12:51:08,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442711585] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:08,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179705649] [2021-08-21 12:51:08,309 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:51:08,309 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:51:08,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:51:08,309 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) [2021-08-21 12:51:08,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-21 12:51:11,394 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 12:51:11,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:51:11,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 50 conjunts are in the unsatisfiable core [2021-08-21 12:51:11,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:51:12,775 INFO L354 Elim1Store]: treesize reduction 492, result has 2.6 percent of original size [2021-08-21 12:51:12,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 115 treesize of output 61 [2021-08-21 12:51:12,805 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:51:12,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179705649] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:12,806 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:51:12,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 25 [2021-08-21 12:51:12,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797889718] [2021-08-21 12:51:12,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 12:51:12,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:51:12,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 12:51:12,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:51:12,807 INFO L87 Difference]: Start difference. First operand 3503 states and 8601 transitions. Second operand has 26 states, 26 states have (on average 3.076923076923077) internal successors, (80), 25 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:13,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:51:13,524 INFO L93 Difference]: Finished difference Result 5127 states and 12657 transitions. [2021-08-21 12:51:13,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 12:51:13,524 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.076923076923077) internal successors, (80), 25 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-08-21 12:51:13,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:51:13,530 INFO L225 Difference]: With dead ends: 5127 [2021-08-21 12:51:13,530 INFO L226 Difference]: Without dead ends: 5087 [2021-08-21 12:51:13,531 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 856.9ms TimeCoverageRelationStatistics Valid=195, Invalid=1527, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 12:51:13,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5087 states. [2021-08-21 12:51:13,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5087 to 3519. [2021-08-21 12:51:13,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3519 states, 3518 states have (on average 2.456225127913587) internal successors, (8641), 3518 states have internal predecessors, (8641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:13,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3519 states to 3519 states and 8641 transitions. [2021-08-21 12:51:13,575 INFO L78 Accepts]: Start accepts. Automaton has 3519 states and 8641 transitions. Word has length 53 [2021-08-21 12:51:13,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:51:13,575 INFO L470 AbstractCegarLoop]: Abstraction has 3519 states and 8641 transitions. [2021-08-21 12:51:13,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.076923076923077) internal successors, (80), 25 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:13,576 INFO L276 IsEmpty]: Start isEmpty. Operand 3519 states and 8641 transitions. [2021-08-21 12:51:13,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-21 12:51:13,581 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:51:13,581 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:51:13,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-08-21 12:51:13,796 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,SelfDestructingSolverStorable48 [2021-08-21 12:51:13,797 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:51:13,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:51:13,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1986024491, now seen corresponding path program 43 times [2021-08-21 12:51:13,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:51:13,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963752834] [2021-08-21 12:51:13,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:51:13,797 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:51:13,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:51:14,183 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:51:14,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:51:14,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963752834] [2021-08-21 12:51:14,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963752834] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:14,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913542563] [2021-08-21 12:51:14,184 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:51:14,184 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:51:14,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:51:14,191 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) [2021-08-21 12:51:14,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-21 12:51:17,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:51:17,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 50 conjunts are in the unsatisfiable core [2021-08-21 12:51:17,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:51:18,641 INFO L354 Elim1Store]: treesize reduction 391, result has 2.5 percent of original size [2021-08-21 12:51:18,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 115 treesize of output 58 [2021-08-21 12:51:18,667 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:51:18,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913542563] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:18,667 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:51:18,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 24 [2021-08-21 12:51:18,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126322441] [2021-08-21 12:51:18,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 12:51:18,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:51:18,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 12:51:18,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:51:18,668 INFO L87 Difference]: Start difference. First operand 3519 states and 8641 transitions. Second operand has 25 states, 25 states have (on average 3.04) internal successors, (76), 24 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:19,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:51:19,446 INFO L93 Difference]: Finished difference Result 6639 states and 16437 transitions. [2021-08-21 12:51:19,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:51:19,446 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.04) internal successors, (76), 24 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-08-21 12:51:19,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:51:19,454 INFO L225 Difference]: With dead ends: 6639 [2021-08-21 12:51:19,454 INFO L226 Difference]: Without dead ends: 6575 [2021-08-21 12:51:19,455 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 813.4ms TimeCoverageRelationStatistics Valid=212, Invalid=1594, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 12:51:19,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6575 states. [2021-08-21 12:51:19,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6575 to 3599. [2021-08-21 12:51:19,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3599 states, 3598 states have (on average 2.4571984435797667) internal successors, (8841), 3598 states have internal predecessors, (8841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:19,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3599 states to 3599 states and 8841 transitions. [2021-08-21 12:51:19,502 INFO L78 Accepts]: Start accepts. Automaton has 3599 states and 8841 transitions. Word has length 53 [2021-08-21 12:51:19,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:51:19,502 INFO L470 AbstractCegarLoop]: Abstraction has 3599 states and 8841 transitions. [2021-08-21 12:51:19,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.04) internal successors, (76), 24 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:19,502 INFO L276 IsEmpty]: Start isEmpty. Operand 3599 states and 8841 transitions. [2021-08-21 12:51:19,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-21 12:51:19,507 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:51:19,507 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:51:19,531 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-08-21 12:51:19,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:51:19,708 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:51:19,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:51:19,710 INFO L82 PathProgramCache]: Analyzing trace with hash -389704747, now seen corresponding path program 44 times [2021-08-21 12:51:19,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:51:19,710 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361543280] [2021-08-21 12:51:19,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:51:19,710 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:51:19,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:51:20,047 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 84 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:51:20,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:51:20,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361543280] [2021-08-21 12:51:20,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361543280] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:20,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712042856] [2021-08-21 12:51:20,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:51:20,048 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:51:20,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:51:20,053 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) [2021-08-21 12:51:20,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-21 12:51:23,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:51:23,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:51:23,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 50 conjunts are in the unsatisfiable core [2021-08-21 12:51:23,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:51:24,591 INFO L354 Elim1Store]: treesize reduction 302, result has 2.3 percent of original size [2021-08-21 12:51:24,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 115 treesize of output 55 [2021-08-21 12:51:24,622 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 9 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:51:24,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712042856] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:24,622 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:51:24,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 21 [2021-08-21 12:51:24,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125581416] [2021-08-21 12:51:24,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:51:24,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:51:24,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:51:24,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:51:24,623 INFO L87 Difference]: Start difference. First operand 3599 states and 8841 transitions. Second operand has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 21 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:25,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:51:25,830 INFO L93 Difference]: Finished difference Result 6975 states and 17146 transitions. [2021-08-21 12:51:25,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 12:51:25,830 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 21 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-08-21 12:51:25,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:51:25,839 INFO L225 Difference]: With dead ends: 6975 [2021-08-21 12:51:25,839 INFO L226 Difference]: Without dead ends: 6535 [2021-08-21 12:51:25,839 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 1091.5ms TimeCoverageRelationStatistics Valid=266, Invalid=1896, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 12:51:25,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6535 states. [2021-08-21 12:51:25,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6535 to 3983. [2021-08-21 12:51:25,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3983 states, 3982 states have (on average 2.4573078854846813) internal successors, (9785), 3982 states have internal predecessors, (9785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:25,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3983 states to 3983 states and 9785 transitions. [2021-08-21 12:51:25,896 INFO L78 Accepts]: Start accepts. Automaton has 3983 states and 9785 transitions. Word has length 53 [2021-08-21 12:51:25,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:51:25,896 INFO L470 AbstractCegarLoop]: Abstraction has 3983 states and 9785 transitions. [2021-08-21 12:51:25,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 21 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:25,896 INFO L276 IsEmpty]: Start isEmpty. Operand 3983 states and 9785 transitions. [2021-08-21 12:51:25,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-21 12:51:25,901 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:51:25,901 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:51:25,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-08-21 12:51:26,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:51:26,111 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:51:26,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:51:26,112 INFO L82 PathProgramCache]: Analyzing trace with hash -93381675, now seen corresponding path program 45 times [2021-08-21 12:51:26,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:51:26,112 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326528441] [2021-08-21 12:51:26,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:51:26,112 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:51:26,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:51:26,456 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 83 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 12:51:26,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:51:26,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326528441] [2021-08-21 12:51:26,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326528441] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:26,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266584531] [2021-08-21 12:51:26,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:51:26,457 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:51:26,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:51:26,465 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) [2021-08-21 12:51:26,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-21 12:51:29,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 12:51:29,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:51:29,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 50 conjunts are in the unsatisfiable core [2021-08-21 12:51:29,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:51:31,139 INFO L354 Elim1Store]: treesize reduction 302, result has 2.3 percent of original size [2021-08-21 12:51:31,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 115 treesize of output 55 [2021-08-21 12:51:31,166 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 10 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:51:31,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266584531] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:31,166 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:51:31,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 20 [2021-08-21 12:51:31,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802136974] [2021-08-21 12:51:31,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 12:51:31,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:51:31,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 12:51:31,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:51:31,167 INFO L87 Difference]: Start difference. First operand 3983 states and 9785 transitions. Second operand has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 20 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:31,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:51:31,840 INFO L93 Difference]: Finished difference Result 6363 states and 15707 transitions. [2021-08-21 12:51:31,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 12:51:31,841 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 20 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-08-21 12:51:31,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:51:31,848 INFO L225 Difference]: With dead ends: 6363 [2021-08-21 12:51:31,848 INFO L226 Difference]: Without dead ends: 6287 [2021-08-21 12:51:31,849 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 692.2ms TimeCoverageRelationStatistics Valid=181, Invalid=1225, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 12:51:31,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6287 states. [2021-08-21 12:51:31,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6287 to 4159. [2021-08-21 12:51:31,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4159 states, 4158 states have (on average 2.4571909571909574) internal successors, (10217), 4158 states have internal predecessors, (10217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:31,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4159 states to 4159 states and 10217 transitions. [2021-08-21 12:51:31,899 INFO L78 Accepts]: Start accepts. Automaton has 4159 states and 10217 transitions. Word has length 53 [2021-08-21 12:51:31,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:51:31,899 INFO L470 AbstractCegarLoop]: Abstraction has 4159 states and 10217 transitions. [2021-08-21 12:51:31,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 20 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:31,899 INFO L276 IsEmpty]: Start isEmpty. Operand 4159 states and 10217 transitions. [2021-08-21 12:51:31,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-21 12:51:31,902 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:51:31,902 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:51:31,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-08-21 12:51:32,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:51:32,103 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:51:32,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:51:32,104 INFO L82 PathProgramCache]: Analyzing trace with hash 705185237, now seen corresponding path program 46 times [2021-08-21 12:51:32,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:51:32,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067281545] [2021-08-21 12:51:32,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:51:32,104 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:51:32,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:51:32,510 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:51:32,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:51:32,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067281545] [2021-08-21 12:51:32,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067281545] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:32,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743484212] [2021-08-21 12:51:32,510 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:51:32,510 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:51:32,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:51:32,511 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) [2021-08-21 12:51:32,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-08-21 12:51:35,994 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:51:35,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:51:35,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 50 conjunts are in the unsatisfiable core [2021-08-21 12:51:35,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:51:37,191 INFO L354 Elim1Store]: treesize reduction 302, result has 2.3 percent of original size [2021-08-21 12:51:37,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 115 treesize of output 55 [2021-08-21 12:51:37,218 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:51:37,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743484212] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:37,219 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:51:37,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 21 [2021-08-21 12:51:37,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512697812] [2021-08-21 12:51:37,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:51:37,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:51:37,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:51:37,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:51:37,220 INFO L87 Difference]: Start difference. First operand 4159 states and 10217 transitions. Second operand has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:38,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:51:38,151 INFO L93 Difference]: Finished difference Result 7891 states and 19402 transitions. [2021-08-21 12:51:38,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 12:51:38,151 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-08-21 12:51:38,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:51:38,161 INFO L225 Difference]: With dead ends: 7891 [2021-08-21 12:51:38,161 INFO L226 Difference]: Without dead ends: 7591 [2021-08-21 12:51:38,161 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 783.1ms TimeCoverageRelationStatistics Valid=201, Invalid=1439, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 12:51:38,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7591 states. [2021-08-21 12:51:38,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7591 to 4687. [2021-08-21 12:51:38,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4687 states, 4686 states have (on average 2.461587708066581) internal successors, (11535), 4686 states have internal predecessors, (11535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:38,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4687 states to 4687 states and 11535 transitions. [2021-08-21 12:51:38,225 INFO L78 Accepts]: Start accepts. Automaton has 4687 states and 11535 transitions. Word has length 53 [2021-08-21 12:51:38,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:51:38,226 INFO L470 AbstractCegarLoop]: Abstraction has 4687 states and 11535 transitions. [2021-08-21 12:51:38,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:38,226 INFO L276 IsEmpty]: Start isEmpty. Operand 4687 states and 11535 transitions. [2021-08-21 12:51:38,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-21 12:51:38,231 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:51:38,231 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:51:38,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-08-21 12:51:38,448 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,SelfDestructingSolverStorable52 [2021-08-21 12:51:38,448 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:51:38,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:51:38,448 INFO L82 PathProgramCache]: Analyzing trace with hash 458083797, now seen corresponding path program 47 times [2021-08-21 12:51:38,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:51:38,448 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286460170] [2021-08-21 12:51:38,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:51:38,448 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:51:38,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:51:38,888 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:51:38,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:51:38,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286460170] [2021-08-21 12:51:38,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286460170] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:38,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114408243] [2021-08-21 12:51:38,889 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:51:38,889 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:51:38,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:51:38,889 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) [2021-08-21 12:51:38,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-08-21 12:51:42,496 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 12:51:42,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:51:42,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 12:51:42,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:51:43,783 INFO L354 Elim1Store]: treesize reduction 730, result has 2.5 percent of original size [2021-08-21 12:51:43,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 86 treesize of output 60 [2021-08-21 12:51:43,820 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:51:43,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114408243] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:43,820 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:51:43,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2021-08-21 12:51:43,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296523031] [2021-08-21 12:51:43,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 12:51:43,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:51:43,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 12:51:43,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:51:43,821 INFO L87 Difference]: Start difference. First operand 4687 states and 11535 transitions. Second operand has 30 states, 30 states have (on average 3.2) internal successors, (96), 29 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:46,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:51:46,379 INFO L93 Difference]: Finished difference Result 9323 states and 22782 transitions. [2021-08-21 12:51:46,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-21 12:51:46,379 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.2) internal successors, (96), 29 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-08-21 12:51:46,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:51:46,391 INFO L225 Difference]: With dead ends: 9323 [2021-08-21 12:51:46,392 INFO L226 Difference]: Without dead ends: 8831 [2021-08-21 12:51:46,392 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1020 ImplicationChecksByTransitivity, 1949.0ms TimeCoverageRelationStatistics Valid=406, Invalid=4150, Unknown=0, NotChecked=0, Total=4556 [2021-08-21 12:51:46,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8831 states. [2021-08-21 12:51:46,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8831 to 5135. [2021-08-21 12:51:46,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5135 states, 5134 states have (on average 2.46805609661083) internal successors, (12671), 5134 states have internal predecessors, (12671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:46,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5135 states to 5135 states and 12671 transitions. [2021-08-21 12:51:46,462 INFO L78 Accepts]: Start accepts. Automaton has 5135 states and 12671 transitions. Word has length 53 [2021-08-21 12:51:46,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:51:46,462 INFO L470 AbstractCegarLoop]: Abstraction has 5135 states and 12671 transitions. [2021-08-21 12:51:46,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.2) internal successors, (96), 29 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:46,462 INFO L276 IsEmpty]: Start isEmpty. Operand 5135 states and 12671 transitions. [2021-08-21 12:51:46,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-21 12:51:46,467 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:51:46,467 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:51:46,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-08-21 12:51:46,667 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,SelfDestructingSolverStorable53 [2021-08-21 12:51:46,668 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:51:46,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:51:46,668 INFO L82 PathProgramCache]: Analyzing trace with hash -671158315, now seen corresponding path program 48 times [2021-08-21 12:51:46,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:51:46,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047291969] [2021-08-21 12:51:46,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:51:46,668 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:51:46,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:51:47,097 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:51:47,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:51:47,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047291969] [2021-08-21 12:51:47,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047291969] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:47,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958710583] [2021-08-21 12:51:47,097 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:51:47,097 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:51:47,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:51:47,099 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) [2021-08-21 12:51:47,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-08-21 12:51:50,881 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 12:51:50,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:51:50,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 52 conjunts are in the unsatisfiable core [2021-08-21 12:51:50,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:51:52,021 INFO L354 Elim1Store]: treesize reduction 238, result has 1.2 percent of original size [2021-08-21 12:51:52,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 123 treesize of output 56 [2021-08-21 12:51:52,048 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:51:52,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958710583] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:52,048 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:51:52,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 20 [2021-08-21 12:51:52,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970184286] [2021-08-21 12:51:52,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 12:51:52,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:51:52,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 12:51:52,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:51:52,049 INFO L87 Difference]: Start difference. First operand 5135 states and 12671 transitions. Second operand has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 20 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:52,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:51:52,867 INFO L93 Difference]: Finished difference Result 8627 states and 21304 transitions. [2021-08-21 12:51:52,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 12:51:52,867 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 20 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-08-21 12:51:52,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:51:52,882 INFO L225 Difference]: With dead ends: 8627 [2021-08-21 12:51:52,882 INFO L226 Difference]: Without dead ends: 8359 [2021-08-21 12:51:52,882 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 43 SyntacticMatches, 6 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 773.1ms TimeCoverageRelationStatistics Valid=177, Invalid=1229, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 12:51:52,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8359 states. [2021-08-21 12:51:52,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8359 to 5615. [2021-08-21 12:51:52,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5615 states, 5614 states have (on average 2.4707873174207338) internal successors, (13871), 5614 states have internal predecessors, (13871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:52,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5615 states to 5615 states and 13871 transitions. [2021-08-21 12:51:52,957 INFO L78 Accepts]: Start accepts. Automaton has 5615 states and 13871 transitions. Word has length 53 [2021-08-21 12:51:52,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:51:52,958 INFO L470 AbstractCegarLoop]: Abstraction has 5615 states and 13871 transitions. [2021-08-21 12:51:52,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 20 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:52,958 INFO L276 IsEmpty]: Start isEmpty. Operand 5615 states and 13871 transitions. [2021-08-21 12:51:52,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-21 12:51:52,963 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:51:52,963 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:51:52,989 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-08-21 12:51:53,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:51:53,163 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:51:53,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:51:53,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1617081301, now seen corresponding path program 49 times [2021-08-21 12:51:53,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:51:53,164 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707207165] [2021-08-21 12:51:53,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:51:53,164 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:51:53,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:51:53,537 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:51:53,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:51:53,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707207165] [2021-08-21 12:51:53,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707207165] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:53,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379532572] [2021-08-21 12:51:53,538 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:51:53,538 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:51:53,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:51:53,539 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) [2021-08-21 12:51:53,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-08-21 12:51:57,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:51:57,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 50 conjunts are in the unsatisfiable core [2021-08-21 12:51:57,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:51:58,607 INFO L354 Elim1Store]: treesize reduction 226, result has 1.3 percent of original size [2021-08-21 12:51:58,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 115 treesize of output 52 [2021-08-21 12:51:58,634 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:51:58,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379532572] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:58,635 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:51:58,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 21 [2021-08-21 12:51:58,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307975149] [2021-08-21 12:51:58,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:51:58,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:51:58,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:51:58,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:51:58,636 INFO L87 Difference]: Start difference. First operand 5615 states and 13871 transitions. Second operand has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:59,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:51:59,487 INFO L93 Difference]: Finished difference Result 10239 states and 25436 transitions. [2021-08-21 12:51:59,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:51:59,487 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-08-21 12:51:59,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:51:59,502 INFO L225 Difference]: With dead ends: 10239 [2021-08-21 12:51:59,502 INFO L226 Difference]: Without dead ends: 10151 [2021-08-21 12:51:59,502 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 42 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 759.2ms TimeCoverageRelationStatistics Valid=195, Invalid=1365, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 12:51:59,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10151 states. [2021-08-21 12:51:59,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10151 to 5423. [2021-08-21 12:51:59,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5423 states, 5422 states have (on average 2.469752858723718) internal successors, (13391), 5422 states have internal predecessors, (13391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:59,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5423 states to 5423 states and 13391 transitions. [2021-08-21 12:51:59,596 INFO L78 Accepts]: Start accepts. Automaton has 5423 states and 13391 transitions. Word has length 53 [2021-08-21 12:51:59,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:51:59,596 INFO L470 AbstractCegarLoop]: Abstraction has 5423 states and 13391 transitions. [2021-08-21 12:51:59,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:59,596 INFO L276 IsEmpty]: Start isEmpty. Operand 5423 states and 13391 transitions. [2021-08-21 12:51:59,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-21 12:51:59,602 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:51:59,603 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:51:59,629 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-08-21 12:51:59,804 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,SelfDestructingSolverStorable55 [2021-08-21 12:51:59,805 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:51:59,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:51:59,805 INFO L82 PathProgramCache]: Analyzing trace with hash -918259755, now seen corresponding path program 50 times [2021-08-21 12:51:59,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:51:59,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350631860] [2021-08-21 12:51:59,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:51:59,805 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:51:59,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:52:00,285 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:00,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:52:00,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350631860] [2021-08-21 12:52:00,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350631860] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:00,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596345314] [2021-08-21 12:52:00,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:52:00,286 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:00,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:52:00,287 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) [2021-08-21 12:52:00,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-08-21 12:52:04,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:52:04,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:52:04,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 50 conjunts are in the unsatisfiable core [2021-08-21 12:52:04,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:52:05,437 INFO L354 Elim1Store]: treesize reduction 226, result has 1.3 percent of original size [2021-08-21 12:52:05,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 115 treesize of output 52 [2021-08-21 12:52:05,463 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:05,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596345314] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:05,464 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:52:05,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2021-08-21 12:52:05,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336073088] [2021-08-21 12:52:05,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:52:05,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:52:05,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:52:05,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:52:05,464 INFO L87 Difference]: Start difference. First operand 5423 states and 13391 transitions. Second operand has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 22 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:06,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:52:06,236 INFO L93 Difference]: Finished difference Result 9175 states and 22799 transitions. [2021-08-21 12:52:06,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:52:06,237 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 22 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-08-21 12:52:06,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:52:06,251 INFO L225 Difference]: With dead ends: 9175 [2021-08-21 12:52:06,251 INFO L226 Difference]: Without dead ends: 9087 [2021-08-21 12:52:06,251 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 837.3ms TimeCoverageRelationStatistics Valid=210, Invalid=1430, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 12:52:06,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9087 states. [2021-08-21 12:52:06,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9087 to 5423. [2021-08-21 12:52:06,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5423 states, 5422 states have (on average 2.469752858723718) internal successors, (13391), 5422 states have internal predecessors, (13391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:06,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5423 states to 5423 states and 13391 transitions. [2021-08-21 12:52:06,332 INFO L78 Accepts]: Start accepts. Automaton has 5423 states and 13391 transitions. Word has length 53 [2021-08-21 12:52:06,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:52:06,332 INFO L470 AbstractCegarLoop]: Abstraction has 5423 states and 13391 transitions. [2021-08-21 12:52:06,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 22 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:06,333 INFO L276 IsEmpty]: Start isEmpty. Operand 5423 states and 13391 transitions. [2021-08-21 12:52:06,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-21 12:52:06,337 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:52:06,337 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:52:06,364 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-08-21 12:52:06,537 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,SelfDestructingSolverStorable56 [2021-08-21 12:52:06,538 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:52:06,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:52:06,538 INFO L82 PathProgramCache]: Analyzing trace with hash 875862485, now seen corresponding path program 51 times [2021-08-21 12:52:06,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:52:06,538 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694470749] [2021-08-21 12:52:06,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:52:06,538 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:52:06,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:52:06,922 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:06,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:52:06,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694470749] [2021-08-21 12:52:06,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694470749] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:06,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661248691] [2021-08-21 12:52:06,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:52:06,922 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:06,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:52:06,923 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) [2021-08-21 12:52:06,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-08-21 12:52:11,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 12:52:11,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:52:11,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 50 conjunts are in the unsatisfiable core [2021-08-21 12:52:11,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:52:12,066 INFO L354 Elim1Store]: treesize reduction 170, result has 0.6 percent of original size [2021-08-21 12:52:12,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 109 treesize of output 43 [2021-08-21 12:52:12,096 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:12,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661248691] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:12,096 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:52:12,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 21 [2021-08-21 12:52:12,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269563929] [2021-08-21 12:52:12,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:52:12,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:52:12,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:52:12,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:52:12,097 INFO L87 Difference]: Start difference. First operand 5423 states and 13391 transitions. Second operand has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:12,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:52:12,908 INFO L93 Difference]: Finished difference Result 7747 states and 19163 transitions. [2021-08-21 12:52:12,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 12:52:12,909 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-08-21 12:52:12,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:52:12,919 INFO L225 Difference]: With dead ends: 7747 [2021-08-21 12:52:12,919 INFO L226 Difference]: Without dead ends: 7711 [2021-08-21 12:52:12,919 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 41 SyntacticMatches, 7 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 741.3ms TimeCoverageRelationStatistics Valid=195, Invalid=1287, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 12:52:12,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7711 states. [2021-08-21 12:52:12,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7711 to 5455. [2021-08-21 12:52:12,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5455 states, 5454 states have (on average 2.46993032636597) internal successors, (13471), 5454 states have internal predecessors, (13471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:12,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5455 states to 5455 states and 13471 transitions. [2021-08-21 12:52:12,997 INFO L78 Accepts]: Start accepts. Automaton has 5455 states and 13471 transitions. Word has length 53 [2021-08-21 12:52:12,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:52:12,997 INFO L470 AbstractCegarLoop]: Abstraction has 5455 states and 13471 transitions. [2021-08-21 12:52:12,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:12,997 INFO L276 IsEmpty]: Start isEmpty. Operand 5455 states and 13471 transitions. [2021-08-21 12:52:13,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-21 12:52:13,002 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:52:13,002 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:52:13,029 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2021-08-21 12:52:13,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:13,203 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:52:13,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:52:13,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1966228311, now seen corresponding path program 52 times [2021-08-21 12:52:13,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:52:13,203 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104771880] [2021-08-21 12:52:13,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:52:13,203 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:52:13,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:52:13,283 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 49 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:13,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:52:13,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104771880] [2021-08-21 12:52:13,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104771880] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:13,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961156061] [2021-08-21 12:52:13,285 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:52:13,285 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:13,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:52:13,288 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) [2021-08-21 12:52:13,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-08-21 12:52:17,512 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:52:17,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:52:17,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 12:52:17,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:52:17,656 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 49 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:52:17,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961156061] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:17,656 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:52:17,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 12:52:17,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873184724] [2021-08-21 12:52:17,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:52:17,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:52:17,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:52:17,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:52:17,657 INFO L87 Difference]: Start difference. First operand 5455 states and 13471 transitions. Second operand has 10 states, 10 states have (on average 6.5) internal successors, (65), 9 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:17,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:52:17,704 INFO L93 Difference]: Finished difference Result 6955 states and 17076 transitions. [2021-08-21 12:52:17,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:52:17,704 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 9 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-08-21 12:52:17,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:52:17,712 INFO L225 Difference]: With dead ends: 6955 [2021-08-21 12:52:17,712 INFO L226 Difference]: Without dead ends: 6947 [2021-08-21 12:52:17,713 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 35.6ms TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:52:17,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6947 states. [2021-08-21 12:52:17,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6947 to 5679. [2021-08-21 12:52:17,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5679 states, 5678 states have (on average 2.47393448397323) internal successors, (14047), 5678 states have internal predecessors, (14047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:17,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5679 states to 5679 states and 14047 transitions. [2021-08-21 12:52:17,786 INFO L78 Accepts]: Start accepts. Automaton has 5679 states and 14047 transitions. Word has length 55 [2021-08-21 12:52:17,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:52:17,786 INFO L470 AbstractCegarLoop]: Abstraction has 5679 states and 14047 transitions. [2021-08-21 12:52:17,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 9 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:17,786 INFO L276 IsEmpty]: Start isEmpty. Operand 5679 states and 14047 transitions. [2021-08-21 12:52:17,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-21 12:52:17,792 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:52:17,792 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:52:17,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-08-21 12:52:18,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:18,009 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:52:18,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:52:18,009 INFO L82 PathProgramCache]: Analyzing trace with hash -2044077263, now seen corresponding path program 53 times [2021-08-21 12:52:18,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:52:18,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535188815] [2021-08-21 12:52:18,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:52:18,009 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:52:18,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:52:18,388 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 7 proven. 107 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:52:18,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:52:18,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535188815] [2021-08-21 12:52:18,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535188815] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:18,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761106026] [2021-08-21 12:52:18,389 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:52:18,389 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:18,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:52:18,390 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) [2021-08-21 12:52:18,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-08-21 12:52:22,690 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-21 12:52:22,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:52:22,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 50 conjunts are in the unsatisfiable core [2021-08-21 12:52:22,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:52:24,014 INFO L354 Elim1Store]: treesize reduction 302, result has 2.3 percent of original size [2021-08-21 12:52:24,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 115 treesize of output 55 [2021-08-21 12:52:24,040 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 7 proven. 107 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:52:24,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761106026] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:24,041 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:52:24,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 22 [2021-08-21 12:52:24,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649195366] [2021-08-21 12:52:24,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:52:24,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:52:24,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:52:24,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:52:24,042 INFO L87 Difference]: Start difference. First operand 5679 states and 14047 transitions. Second operand has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 22 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:25,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:52:25,494 INFO L93 Difference]: Finished difference Result 9899 states and 24624 transitions. [2021-08-21 12:52:25,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 12:52:25,494 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 22 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-08-21 12:52:25,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:52:25,507 INFO L225 Difference]: With dead ends: 9899 [2021-08-21 12:52:25,507 INFO L226 Difference]: Without dead ends: 9815 [2021-08-21 12:52:25,507 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 1293.7ms TimeCoverageRelationStatistics Valid=311, Invalid=2239, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 12:52:25,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9815 states. [2021-08-21 12:52:25,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9815 to 5583. [2021-08-21 12:52:25,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5583 states, 5582 states have (on average 2.4734862056610534) internal successors, (13807), 5582 states have internal predecessors, (13807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:25,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5583 states to 5583 states and 13807 transitions. [2021-08-21 12:52:25,584 INFO L78 Accepts]: Start accepts. Automaton has 5583 states and 13807 transitions. Word has length 57 [2021-08-21 12:52:25,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:52:25,584 INFO L470 AbstractCegarLoop]: Abstraction has 5583 states and 13807 transitions. [2021-08-21 12:52:25,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 22 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:25,584 INFO L276 IsEmpty]: Start isEmpty. Operand 5583 states and 13807 transitions. [2021-08-21 12:52:25,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-08-21 12:52:25,589 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:52:25,589 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:52:25,617 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2021-08-21 12:52:25,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-08-21 12:52:25,790 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:52:25,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:52:25,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1412485197, now seen corresponding path program 54 times [2021-08-21 12:52:25,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:52:25,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479312828] [2021-08-21 12:52:25,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:52:25,791 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:52:25,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:52:26,219 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:52:26,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:52:26,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479312828] [2021-08-21 12:52:26,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479312828] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:26,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576346387] [2021-08-21 12:52:26,220 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:52:26,220 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:26,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:52:26,221 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) [2021-08-21 12:52:26,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-08-21 12:52:30,575 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 12:52:30,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:52:30,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-21 12:52:30,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:52:35,729 INFO L354 Elim1Store]: treesize reduction 822, result has 2.3 percent of original size [2021-08-21 12:52:35,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 141 treesize of output 87 [2021-08-21 12:52:35,762 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:35,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576346387] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:35,763 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:52:35,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-08-21 12:52:35,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472263358] [2021-08-21 12:52:35,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 12:52:35,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:52:35,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 12:52:35,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=772, Unknown=1, NotChecked=0, Total=870 [2021-08-21 12:52:35,764 INFO L87 Difference]: Start difference. First operand 5583 states and 13807 transitions. Second operand has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 29 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:47,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:52:47,722 INFO L93 Difference]: Finished difference Result 11439 states and 28467 transitions. [2021-08-21 12:52:47,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 12:52:47,722 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 29 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-08-21 12:52:47,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:52:47,737 INFO L225 Difference]: With dead ends: 11439 [2021-08-21 12:52:47,737 INFO L226 Difference]: Without dead ends: 11119 [2021-08-21 12:52:47,738 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 5752.3ms TimeCoverageRelationStatistics Valid=268, Invalid=2487, Unknown=1, NotChecked=0, Total=2756 [2021-08-21 12:52:47,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11119 states. [2021-08-21 12:52:47,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11119 to 5839. [2021-08-21 12:52:47,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5839 states, 5838 states have (on average 2.4691675231243577) internal successors, (14415), 5838 states have internal predecessors, (14415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:47,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5839 states to 5839 states and 14415 transitions. [2021-08-21 12:52:47,822 INFO L78 Accepts]: Start accepts. Automaton has 5839 states and 14415 transitions. Word has length 59 [2021-08-21 12:52:47,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:52:47,822 INFO L470 AbstractCegarLoop]: Abstraction has 5839 states and 14415 transitions. [2021-08-21 12:52:47,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 29 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:47,823 INFO L276 IsEmpty]: Start isEmpty. Operand 5839 states and 14415 transitions. [2021-08-21 12:52:47,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-08-21 12:52:47,830 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:52:47,830 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:52:47,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-08-21 12:52:48,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:48,057 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:52:48,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:52:48,057 INFO L82 PathProgramCache]: Analyzing trace with hash 445471155, now seen corresponding path program 55 times [2021-08-21 12:52:48,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:52:48,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740981964] [2021-08-21 12:52:48,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:52:48,057 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:52:48,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:52:48,553 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:52:48,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:52:48,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740981964] [2021-08-21 12:52:48,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740981964] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:48,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59614343] [2021-08-21 12:52:48,553 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:52:48,553 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:48,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:52:48,554 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) [2021-08-21 12:52:48,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-08-21 12:52:53,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:52:53,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-21 12:52:53,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:52:54,913 INFO L354 Elim1Store]: treesize reduction 870, result has 2.1 percent of original size [2021-08-21 12:52:54,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 132 treesize of output 72 [2021-08-21 12:52:54,940 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:54,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59614343] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:54,941 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:52:54,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-08-21 12:52:54,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066464668] [2021-08-21 12:52:54,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 12:52:54,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:52:54,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 12:52:54,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:52:54,942 INFO L87 Difference]: Start difference. First operand 5839 states and 14415 transitions. Second operand has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 29 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:56,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:52:56,074 INFO L93 Difference]: Finished difference Result 10199 states and 25311 transitions. [2021-08-21 12:52:56,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 12:52:56,074 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 29 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-08-21 12:52:56,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:52:56,087 INFO L225 Difference]: With dead ends: 10199 [2021-08-21 12:52:56,087 INFO L226 Difference]: Without dead ends: 10159 [2021-08-21 12:52:56,087 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 758 ImplicationChecksByTransitivity, 1111.3ms TimeCoverageRelationStatistics Valid=274, Invalid=2482, Unknown=0, NotChecked=0, Total=2756 [2021-08-21 12:52:56,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10159 states. [2021-08-21 12:52:56,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10159 to 5903. [2021-08-21 12:52:56,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5903 states, 5902 states have (on average 2.4695018637749917) internal successors, (14575), 5902 states have internal predecessors, (14575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:56,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5903 states to 5903 states and 14575 transitions. [2021-08-21 12:52:56,172 INFO L78 Accepts]: Start accepts. Automaton has 5903 states and 14575 transitions. Word has length 59 [2021-08-21 12:52:56,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:52:56,172 INFO L470 AbstractCegarLoop]: Abstraction has 5903 states and 14575 transitions. [2021-08-21 12:52:56,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 29 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:56,172 INFO L276 IsEmpty]: Start isEmpty. Operand 5903 states and 14575 transitions. [2021-08-21 12:52:56,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-08-21 12:52:56,177 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:52:56,177 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:52:56,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-08-21 12:52:56,378 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,SelfDestructingSolverStorable61 [2021-08-21 12:52:56,378 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:52:56,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:52:56,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1531796403, now seen corresponding path program 56 times [2021-08-21 12:52:56,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:52:56,379 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168720754] [2021-08-21 12:52:56,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:52:56,379 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:52:56,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:52:56,805 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:56,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:52:56,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168720754] [2021-08-21 12:52:56,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168720754] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:56,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662540961] [2021-08-21 12:52:56,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:52:56,805 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:56,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:52:56,806 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) [2021-08-21 12:52:56,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-08-21 12:53:01,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:53:01,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:53:01,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-21 12:53:01,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:53:03,186 INFO L354 Elim1Store]: treesize reduction 870, result has 2.1 percent of original size [2021-08-21 12:53:03,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 132 treesize of output 72 [2021-08-21 12:53:03,213 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 11 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:53:03,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662540961] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:53:03,214 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:53:03,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18] total 27 [2021-08-21 12:53:03,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626048836] [2021-08-21 12:53:03,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 12:53:03,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:53:03,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 12:53:03,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:53:03,215 INFO L87 Difference]: Start difference. First operand 5903 states and 14575 transitions. Second operand has 28 states, 28 states have (on average 3.4285714285714284) internal successors, (96), 27 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:04,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:53:04,763 INFO L93 Difference]: Finished difference Result 9127 states and 22517 transitions. [2021-08-21 12:53:04,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 12:53:04,764 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.4285714285714284) internal successors, (96), 27 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-08-21 12:53:04,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:53:04,776 INFO L225 Difference]: With dead ends: 9127 [2021-08-21 12:53:04,776 INFO L226 Difference]: Without dead ends: 8719 [2021-08-21 12:53:04,777 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 1285.1ms TimeCoverageRelationStatistics Valid=301, Invalid=2351, Unknown=0, NotChecked=0, Total=2652 [2021-08-21 12:53:04,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8719 states. [2021-08-21 12:53:04,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8719 to 6191. [2021-08-21 12:53:04,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6191 states, 6190 states have (on average 2.467043618739903) internal successors, (15271), 6190 states have internal predecessors, (15271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:04,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6191 states to 6191 states and 15271 transitions. [2021-08-21 12:53:04,867 INFO L78 Accepts]: Start accepts. Automaton has 6191 states and 15271 transitions. Word has length 59 [2021-08-21 12:53:04,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:53:04,867 INFO L470 AbstractCegarLoop]: Abstraction has 6191 states and 15271 transitions. [2021-08-21 12:53:04,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.4285714285714284) internal successors, (96), 27 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:04,867 INFO L276 IsEmpty]: Start isEmpty. Operand 6191 states and 15271 transitions. [2021-08-21 12:53:04,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-08-21 12:53:04,872 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:53:04,872 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:53:04,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-08-21 12:53:05,072 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,SelfDestructingSolverStorable62 [2021-08-21 12:53:05,073 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:53:05,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:53:05,073 INFO L82 PathProgramCache]: Analyzing trace with hash 454482355, now seen corresponding path program 57 times [2021-08-21 12:53:05,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:53:05,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697245793] [2021-08-21 12:53:05,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:53:05,073 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:53:05,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:53:05,473 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:53:05,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:53:05,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697245793] [2021-08-21 12:53:05,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697245793] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:53:05,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752300311] [2021-08-21 12:53:05,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:53:05,474 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:53:05,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:53:05,474 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) [2021-08-21 12:53:05,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-08-21 12:53:10,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-21 12:53:10,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:53:10,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-21 12:53:10,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:53:12,101 INFO L354 Elim1Store]: treesize reduction 870, result has 2.1 percent of original size [2021-08-21 12:53:12,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 132 treesize of output 72 [2021-08-21 12:53:12,127 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:53:12,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752300311] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:53:12,127 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:53:12,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-08-21 12:53:12,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123733115] [2021-08-21 12:53:12,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 12:53:12,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:53:12,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 12:53:12,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:53:12,128 INFO L87 Difference]: Start difference. First operand 6191 states and 15271 transitions. Second operand has 30 states, 30 states have (on average 3.2) internal successors, (96), 29 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:13,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:53:13,390 INFO L93 Difference]: Finished difference Result 13303 states and 33275 transitions. [2021-08-21 12:53:13,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 12:53:13,391 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.2) internal successors, (96), 29 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-08-21 12:53:13,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:53:13,411 INFO L225 Difference]: With dead ends: 13303 [2021-08-21 12:53:13,411 INFO L226 Difference]: Without dead ends: 13119 [2021-08-21 12:53:13,412 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 1144.2ms TimeCoverageRelationStatistics Valid=274, Invalid=2482, Unknown=0, NotChecked=0, Total=2756 [2021-08-21 12:53:13,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13119 states. [2021-08-21 12:53:13,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13119 to 5487. [2021-08-21 12:53:13,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5487 states, 5486 states have (on average 2.473022238425082) internal successors, (13567), 5486 states have internal predecessors, (13567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:13,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5487 states to 5487 states and 13567 transitions. [2021-08-21 12:53:13,513 INFO L78 Accepts]: Start accepts. Automaton has 5487 states and 13567 transitions. Word has length 59 [2021-08-21 12:53:13,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:53:13,513 INFO L470 AbstractCegarLoop]: Abstraction has 5487 states and 13567 transitions. [2021-08-21 12:53:13,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.2) internal successors, (96), 29 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:13,514 INFO L276 IsEmpty]: Start isEmpty. Operand 5487 states and 13567 transitions. [2021-08-21 12:53:13,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-08-21 12:53:13,519 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:53:13,519 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:53:13,548 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2021-08-21 12:53:13,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:53:13,720 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:53:13,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:53:13,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1982528589, now seen corresponding path program 58 times [2021-08-21 12:53:13,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:53:13,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057381243] [2021-08-21 12:53:13,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:53:13,720 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:53:13,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:53:14,243 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:53:14,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:53:14,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057381243] [2021-08-21 12:53:14,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057381243] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:53:14,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852012923] [2021-08-21 12:53:14,244 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:53:14,244 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:53:14,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:53:14,251 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) [2021-08-21 12:53:14,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-08-21 12:53:19,115 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:53:19,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:53:19,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-21 12:53:19,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:53:20,962 INFO L354 Elim1Store]: treesize reduction 870, result has 2.1 percent of original size [2021-08-21 12:53:20,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 132 treesize of output 72 [2021-08-21 12:53:20,989 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:53:20,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852012923] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:53:20,990 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:53:20,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-08-21 12:53:20,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937051177] [2021-08-21 12:53:20,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 12:53:20,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:53:20,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 12:53:20,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:53:20,991 INFO L87 Difference]: Start difference. First operand 5487 states and 13567 transitions. Second operand has 30 states, 30 states have (on average 3.2) internal successors, (96), 29 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:22,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:53:22,137 INFO L93 Difference]: Finished difference Result 11223 states and 27887 transitions. [2021-08-21 12:53:22,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 12:53:22,137 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.2) internal successors, (96), 29 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-08-21 12:53:22,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:53:22,150 INFO L225 Difference]: With dead ends: 11223 [2021-08-21 12:53:22,150 INFO L226 Difference]: Without dead ends: 11183 [2021-08-21 12:53:22,150 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 1158.9ms TimeCoverageRelationStatistics Valid=274, Invalid=2482, Unknown=0, NotChecked=0, Total=2756 [2021-08-21 12:53:22,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11183 states. [2021-08-21 12:53:22,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11183 to 5887. [2021-08-21 12:53:22,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5887 states, 5886 states have (on average 2.4694189602446484) internal successors, (14535), 5886 states have internal predecessors, (14535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:22,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5887 states to 5887 states and 14535 transitions. [2021-08-21 12:53:22,233 INFO L78 Accepts]: Start accepts. Automaton has 5887 states and 14535 transitions. Word has length 59 [2021-08-21 12:53:22,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:53:22,233 INFO L470 AbstractCegarLoop]: Abstraction has 5887 states and 14535 transitions. [2021-08-21 12:53:22,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.2) internal successors, (96), 29 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:22,234 INFO L276 IsEmpty]: Start isEmpty. Operand 5887 states and 14535 transitions. [2021-08-21 12:53:22,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-08-21 12:53:22,239 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:53:22,239 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:53:22,267 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2021-08-21 12:53:22,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:53:22,439 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:53:22,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:53:22,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1940006323, now seen corresponding path program 59 times [2021-08-21 12:53:22,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:53:22,440 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709617630] [2021-08-21 12:53:22,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:53:22,440 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:53:22,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:53:22,873 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:53:22,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:53:22,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709617630] [2021-08-21 12:53:22,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709617630] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:53:22,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296618871] [2021-08-21 12:53:22,873 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:53:22,873 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:53:22,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:53:22,875 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) [2021-08-21 12:53:22,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-08-21 12:53:27,930 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-21 12:53:27,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:53:27,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 59 conjunts are in the unsatisfiable core [2021-08-21 12:53:27,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:53:29,751 INFO L354 Elim1Store]: treesize reduction 1019, result has 2.1 percent of original size [2021-08-21 12:53:29,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 98 treesize of output 67 [2021-08-21 12:53:29,797 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:53:29,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296618871] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:53:29,797 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:53:29,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2021-08-21 12:53:29,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509075724] [2021-08-21 12:53:29,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-21 12:53:29,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:53:29,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-21 12:53:29,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1031, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 12:53:29,798 INFO L87 Difference]: Start difference. First operand 5887 states and 14535 transitions. Second operand has 34 states, 34 states have (on average 3.176470588235294) internal successors, (108), 33 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:33,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:53:33,450 INFO L93 Difference]: Finished difference Result 12539 states and 31077 transitions. [2021-08-21 12:53:33,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-21 12:53:33,451 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.176470588235294) internal successors, (108), 33 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-08-21 12:53:33,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:53:33,465 INFO L225 Difference]: With dead ends: 12539 [2021-08-21 12:53:33,465 INFO L226 Difference]: Without dead ends: 11983 [2021-08-21 12:53:33,466 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 2448.4ms TimeCoverageRelationStatistics Valid=374, Invalid=3916, Unknown=0, NotChecked=0, Total=4290 [2021-08-21 12:53:33,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11983 states. [2021-08-21 12:53:33,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11983 to 6239. [2021-08-21 12:53:33,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6239 states, 6238 states have (on average 2.4685796729721066) internal successors, (15399), 6238 states have internal predecessors, (15399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:33,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6239 states to 6239 states and 15399 transitions. [2021-08-21 12:53:33,561 INFO L78 Accepts]: Start accepts. Automaton has 6239 states and 15399 transitions. Word has length 59 [2021-08-21 12:53:33,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:53:33,561 INFO L470 AbstractCegarLoop]: Abstraction has 6239 states and 15399 transitions. [2021-08-21 12:53:33,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.176470588235294) internal successors, (108), 33 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:33,561 INFO L276 IsEmpty]: Start isEmpty. Operand 6239 states and 15399 transitions. [2021-08-21 12:53:33,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-08-21 12:53:33,567 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:53:33,567 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:53:33,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-08-21 12:53:33,768 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,SelfDestructingSolverStorable65 [2021-08-21 12:53:33,769 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:53:33,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:53:33,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1991482445, now seen corresponding path program 60 times [2021-08-21 12:53:33,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:53:33,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426361337] [2021-08-21 12:53:33,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:53:33,769 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:53:33,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:53:34,288 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:53:34,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:53:34,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426361337] [2021-08-21 12:53:34,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426361337] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:53:34,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126196468] [2021-08-21 12:53:34,289 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:53:34,289 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:53:34,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:53:34,289 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) [2021-08-21 12:53:34,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-08-21 12:53:39,403 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-21 12:53:39,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:53:39,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-21 12:53:39,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:53:41,136 INFO L354 Elim1Store]: treesize reduction 870, result has 2.1 percent of original size [2021-08-21 12:53:41,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 134 treesize of output 74 [2021-08-21 12:53:41,163 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 11 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:53:41,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126196468] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:53:41,163 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:53:41,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-08-21 12:53:41,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895530640] [2021-08-21 12:53:41,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 12:53:41,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:53:41,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 12:53:41,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:53:41,164 INFO L87 Difference]: Start difference. First operand 6239 states and 15399 transitions. Second operand has 31 states, 31 states have (on average 3.161290322580645) internal successors, (98), 30 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:43,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:53:43,504 INFO L93 Difference]: Finished difference Result 9215 states and 22731 transitions. [2021-08-21 12:53:43,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 12:53:43,504 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.161290322580645) internal successors, (98), 30 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-08-21 12:53:43,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:53:43,514 INFO L225 Difference]: With dead ends: 9215 [2021-08-21 12:53:43,514 INFO L226 Difference]: Without dead ends: 9135 [2021-08-21 12:53:43,514 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 2106.9ms TimeCoverageRelationStatistics Valid=404, Invalid=3378, Unknown=0, NotChecked=0, Total=3782 [2021-08-21 12:53:43,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9135 states. [2021-08-21 12:53:43,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9135 to 6943. [2021-08-21 12:53:43,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6943 states, 6942 states have (on average 2.4636992221261886) internal successors, (17103), 6942 states have internal predecessors, (17103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:43,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6943 states to 6943 states and 17103 transitions. [2021-08-21 12:53:43,603 INFO L78 Accepts]: Start accepts. Automaton has 6943 states and 17103 transitions. Word has length 59 [2021-08-21 12:53:43,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:53:43,603 INFO L470 AbstractCegarLoop]: Abstraction has 6943 states and 17103 transitions. [2021-08-21 12:53:43,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.161290322580645) internal successors, (98), 30 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:43,604 INFO L276 IsEmpty]: Start isEmpty. Operand 6943 states and 17103 transitions. [2021-08-21 12:53:43,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-08-21 12:53:43,610 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:53:43,610 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:53:43,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-08-21 12:53:43,811 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,SelfDestructingSolverStorable66 [2021-08-21 12:53:43,811 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:53:43,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:53:43,811 INFO L82 PathProgramCache]: Analyzing trace with hash -858441805, now seen corresponding path program 61 times [2021-08-21 12:53:43,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:53:43,812 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025154006] [2021-08-21 12:53:43,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:53:43,812 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:53:43,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:53:44,438 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:53:44,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:53:44,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025154006] [2021-08-21 12:53:44,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025154006] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:53:44,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677967179] [2021-08-21 12:53:44,438 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:53:44,439 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:53:44,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:53:44,439 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) [2021-08-21 12:53:44,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-08-21 12:53:49,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:53:49,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-21 12:53:49,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:53:51,510 INFO L354 Elim1Store]: treesize reduction 870, result has 2.1 percent of original size [2021-08-21 12:53:51,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 132 treesize of output 72 [2021-08-21 12:53:51,537 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:53:51,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677967179] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:53:51,537 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:53:51,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 28 [2021-08-21 12:53:51,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289239616] [2021-08-21 12:53:51,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 12:53:51,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:53:51,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 12:53:51,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:53:51,538 INFO L87 Difference]: Start difference. First operand 6943 states and 17103 transitions. Second operand has 29 states, 29 states have (on average 3.310344827586207) internal successors, (96), 28 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:53,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:53:53,142 INFO L93 Difference]: Finished difference Result 13115 states and 32667 transitions. [2021-08-21 12:53:53,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 12:53:53,142 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.310344827586207) internal successors, (96), 28 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-08-21 12:53:53,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:53:53,160 INFO L225 Difference]: With dead ends: 13115 [2021-08-21 12:53:53,161 INFO L226 Difference]: Without dead ends: 12959 [2021-08-21 12:53:53,161 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 871 ImplicationChecksByTransitivity, 1585.6ms TimeCoverageRelationStatistics Valid=347, Invalid=2845, Unknown=0, NotChecked=0, Total=3192 [2021-08-21 12:53:53,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12959 states. [2021-08-21 12:53:53,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12959 to 5775. [2021-08-21 12:53:53,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5775 states, 5774 states have (on average 2.467786629719432) internal successors, (14249), 5774 states have internal predecessors, (14249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:53,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5775 states to 5775 states and 14249 transitions. [2021-08-21 12:53:53,256 INFO L78 Accepts]: Start accepts. Automaton has 5775 states and 14249 transitions. Word has length 59 [2021-08-21 12:53:53,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:53:53,256 INFO L470 AbstractCegarLoop]: Abstraction has 5775 states and 14249 transitions. [2021-08-21 12:53:53,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.310344827586207) internal successors, (96), 28 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:53,257 INFO L276 IsEmpty]: Start isEmpty. Operand 5775 states and 14249 transitions. [2021-08-21 12:53:53,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-08-21 12:53:53,261 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:53:53,262 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:53:53,294 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2021-08-21 12:53:53,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:53:53,462 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:53:53,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:53:53,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1672226739, now seen corresponding path program 62 times [2021-08-21 12:53:53,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:53:53,463 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887497700] [2021-08-21 12:53:53,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:53:53,463 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:53:53,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:53:53,923 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:53:53,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:53:53,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887497700] [2021-08-21 12:53:53,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887497700] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:53:53,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691329350] [2021-08-21 12:53:53,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:53:53,923 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:53:53,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:53:53,957 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) [2021-08-21 12:53:53,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-08-21 12:53:59,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:53:59,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:53:59,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-21 12:53:59,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:54:01,416 INFO L354 Elim1Store]: treesize reduction 870, result has 2.1 percent of original size [2021-08-21 12:54:01,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 132 treesize of output 72 [2021-08-21 12:54:01,443 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 11 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:54:01,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691329350] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:54:01,443 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:54:01,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 28 [2021-08-21 12:54:01,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435606335] [2021-08-21 12:54:01,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 12:54:01,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:54:01,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 12:54:01,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:54:01,444 INFO L87 Difference]: Start difference. First operand 5775 states and 14249 transitions. Second operand has 29 states, 29 states have (on average 3.310344827586207) internal successors, (96), 28 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:02,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:54:02,955 INFO L93 Difference]: Finished difference Result 9511 states and 23465 transitions. [2021-08-21 12:54:02,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 12:54:02,956 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.310344827586207) internal successors, (96), 28 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-08-21 12:54:02,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:54:02,965 INFO L225 Difference]: With dead ends: 9511 [2021-08-21 12:54:02,965 INFO L226 Difference]: Without dead ends: 9119 [2021-08-21 12:54:02,966 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 1364.1ms TimeCoverageRelationStatistics Valid=287, Invalid=2365, Unknown=0, NotChecked=0, Total=2652 [2021-08-21 12:54:02,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9119 states. [2021-08-21 12:54:03,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9119 to 6223. [2021-08-21 12:54:03,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6223 states, 6222 states have (on average 2.4611057537769208) internal successors, (15313), 6222 states have internal predecessors, (15313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:03,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6223 states to 6223 states and 15313 transitions. [2021-08-21 12:54:03,041 INFO L78 Accepts]: Start accepts. Automaton has 6223 states and 15313 transitions. Word has length 59 [2021-08-21 12:54:03,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:54:03,041 INFO L470 AbstractCegarLoop]: Abstraction has 6223 states and 15313 transitions. [2021-08-21 12:54:03,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.310344827586207) internal successors, (96), 28 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:03,041 INFO L276 IsEmpty]: Start isEmpty. Operand 6223 states and 15313 transitions. [2021-08-21 12:54:03,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-08-21 12:54:03,046 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:54:03,046 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:54:03,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-08-21 12:54:03,246 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,SelfDestructingSolverStorable68 [2021-08-21 12:54:03,247 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:54:03,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:54:03,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1842098253, now seen corresponding path program 63 times [2021-08-21 12:54:03,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:54:03,247 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192673720] [2021-08-21 12:54:03,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:54:03,247 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:54:03,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:54:03,825 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:54:03,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:54:03,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192673720] [2021-08-21 12:54:03,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192673720] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:54:03,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900334583] [2021-08-21 12:54:03,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:54:03,826 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:54:03,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:54:03,826 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) [2021-08-21 12:54:03,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-08-21 12:54:09,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-21 12:54:09,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:54:09,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-21 12:54:09,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:54:11,248 INFO L354 Elim1Store]: treesize reduction 870, result has 2.1 percent of original size [2021-08-21 12:54:11,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 132 treesize of output 72 [2021-08-21 12:54:11,276 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:54:11,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900334583] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:54:11,276 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:54:11,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-08-21 12:54:11,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685512005] [2021-08-21 12:54:11,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 12:54:11,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:54:11,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 12:54:11,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:54:11,277 INFO L87 Difference]: Start difference. First operand 6223 states and 15313 transitions. Second operand has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 30 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:12,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:54:12,577 INFO L93 Difference]: Finished difference Result 10679 states and 26681 transitions. [2021-08-21 12:54:12,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 12:54:12,577 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 30 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-08-21 12:54:12,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:54:12,591 INFO L225 Difference]: With dead ends: 10679 [2021-08-21 12:54:12,591 INFO L226 Difference]: Without dead ends: 10495 [2021-08-21 12:54:12,591 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 1183.9ms TimeCoverageRelationStatistics Valid=254, Invalid=2196, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 12:54:12,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10495 states. [2021-08-21 12:54:12,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10495 to 6367. [2021-08-21 12:54:12,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6367 states, 6366 states have (on average 2.4594721960414705) internal successors, (15657), 6366 states have internal predecessors, (15657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:12,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6367 states to 6367 states and 15657 transitions. [2021-08-21 12:54:12,679 INFO L78 Accepts]: Start accepts. Automaton has 6367 states and 15657 transitions. Word has length 59 [2021-08-21 12:54:12,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:54:12,680 INFO L470 AbstractCegarLoop]: Abstraction has 6367 states and 15657 transitions. [2021-08-21 12:54:12,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 30 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:12,680 INFO L276 IsEmpty]: Start isEmpty. Operand 6367 states and 15657 transitions. [2021-08-21 12:54:12,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-08-21 12:54:12,685 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:54:12,685 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:54:12,716 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2021-08-21 12:54:12,885 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,SelfDestructingSolverStorable69 [2021-08-21 12:54:12,885 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:54:12,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:54:12,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1246017101, now seen corresponding path program 64 times [2021-08-21 12:54:12,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:54:12,886 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137979753] [2021-08-21 12:54:12,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:54:12,886 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:54:12,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:54:13,464 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:54:13,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:54:13,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137979753] [2021-08-21 12:54:13,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137979753] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:54:13,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011472602] [2021-08-21 12:54:13,464 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:54:13,464 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:54:13,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:54:13,465 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) [2021-08-21 12:54:13,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-08-21 12:54:19,075 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:54:19,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:54:19,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-21 12:54:19,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:54:20,928 INFO L354 Elim1Store]: treesize reduction 870, result has 2.1 percent of original size [2021-08-21 12:54:20,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 132 treesize of output 72 [2021-08-21 12:54:20,956 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 11 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:54:20,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011472602] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:54:20,956 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:54:20,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 28 [2021-08-21 12:54:20,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118740931] [2021-08-21 12:54:20,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 12:54:20,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:54:20,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 12:54:20,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:54:20,957 INFO L87 Difference]: Start difference. First operand 6367 states and 15657 transitions. Second operand has 29 states, 29 states have (on average 3.310344827586207) internal successors, (96), 28 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:22,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:54:22,248 INFO L93 Difference]: Finished difference Result 9911 states and 24467 transitions. [2021-08-21 12:54:22,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 12:54:22,248 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.310344827586207) internal successors, (96), 28 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-08-21 12:54:22,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:54:22,260 INFO L225 Difference]: With dead ends: 9911 [2021-08-21 12:54:22,260 INFO L226 Difference]: Without dead ends: 9583 [2021-08-21 12:54:22,261 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 1200.3ms TimeCoverageRelationStatistics Valid=244, Invalid=2012, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 12:54:22,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9583 states. [2021-08-21 12:54:22,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9583 to 7023. [2021-08-21 12:54:22,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7023 states, 7022 states have (on average 2.456422671603532) internal successors, (17249), 7022 states have internal predecessors, (17249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:22,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7023 states to 7023 states and 17249 transitions. [2021-08-21 12:54:22,347 INFO L78 Accepts]: Start accepts. Automaton has 7023 states and 17249 transitions. Word has length 59 [2021-08-21 12:54:22,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:54:22,347 INFO L470 AbstractCegarLoop]: Abstraction has 7023 states and 17249 transitions. [2021-08-21 12:54:22,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.310344827586207) internal successors, (96), 28 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:22,347 INFO L276 IsEmpty]: Start isEmpty. Operand 7023 states and 17249 transitions. [2021-08-21 12:54:22,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-08-21 12:54:22,356 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:54:22,356 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:54:22,393 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2021-08-21 12:54:22,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:54:22,579 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:54:22,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:54:22,579 INFO L82 PathProgramCache]: Analyzing trace with hash -112976461, now seen corresponding path program 65 times [2021-08-21 12:54:22,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:54:22,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200670399] [2021-08-21 12:54:22,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:54:22,579 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:54:22,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:54:23,043 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:54:23,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:54:23,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200670399] [2021-08-21 12:54:23,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200670399] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:54:23,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644094333] [2021-08-21 12:54:23,043 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:54:23,043 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:54:23,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:54:23,044 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) [2021-08-21 12:54:23,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-08-21 12:54:28,829 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-21 12:54:28,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:54:28,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-21 12:54:28,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:54:30,762 INFO L354 Elim1Store]: treesize reduction 870, result has 2.1 percent of original size [2021-08-21 12:54:30,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 132 treesize of output 72 [2021-08-21 12:54:30,789 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:54:30,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644094333] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:54:30,789 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:54:30,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-08-21 12:54:30,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605157194] [2021-08-21 12:54:30,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 12:54:30,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:54:30,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 12:54:30,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:54:30,790 INFO L87 Difference]: Start difference. First operand 7023 states and 17249 transitions. Second operand has 30 states, 30 states have (on average 3.2) internal successors, (96), 29 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:31,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:54:31,985 INFO L93 Difference]: Finished difference Result 13287 states and 32993 transitions. [2021-08-21 12:54:31,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 12:54:31,985 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.2) internal successors, (96), 29 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-08-21 12:54:31,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:54:32,005 INFO L225 Difference]: With dead ends: 13287 [2021-08-21 12:54:32,005 INFO L226 Difference]: Without dead ends: 13199 [2021-08-21 12:54:32,005 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 581 ImplicationChecksByTransitivity, 1092.6ms TimeCoverageRelationStatistics Valid=243, Invalid=2109, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 12:54:32,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13199 states. [2021-08-21 12:54:32,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13199 to 6847. [2021-08-21 12:54:32,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6847 states, 6846 states have (on average 2.455302366345311) internal successors, (16809), 6846 states have internal predecessors, (16809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:32,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6847 states to 6847 states and 16809 transitions. [2021-08-21 12:54:32,111 INFO L78 Accepts]: Start accepts. Automaton has 6847 states and 16809 transitions. Word has length 59 [2021-08-21 12:54:32,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:54:32,112 INFO L470 AbstractCegarLoop]: Abstraction has 6847 states and 16809 transitions. [2021-08-21 12:54:32,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.2) internal successors, (96), 29 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:32,112 INFO L276 IsEmpty]: Start isEmpty. Operand 6847 states and 16809 transitions. [2021-08-21 12:54:32,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-08-21 12:54:32,118 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:54:32,118 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:54:32,150 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2021-08-21 12:54:32,318 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,SelfDestructingSolverStorable71 [2021-08-21 12:54:32,319 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:54:32,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:54:32,319 INFO L82 PathProgramCache]: Analyzing trace with hash -465374797, now seen corresponding path program 66 times [2021-08-21 12:54:32,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:54:32,319 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231805263] [2021-08-21 12:54:32,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:54:32,319 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:54:32,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:54:32,930 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:54:32,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:54:32,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231805263] [2021-08-21 12:54:32,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231805263] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:54:32,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504934218] [2021-08-21 12:54:32,931 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:54:32,931 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:54:32,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:54:32,931 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) [2021-08-21 12:54:32,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-08-21 12:54:38,864 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-21 12:54:38,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:54:38,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-21 12:54:38,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:54:40,786 INFO L354 Elim1Store]: treesize reduction 870, result has 2.1 percent of original size [2021-08-21 12:54:40,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 132 treesize of output 72 [2021-08-21 12:54:40,813 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:54:40,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504934218] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:54:40,813 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:54:40,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-08-21 12:54:40,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457787746] [2021-08-21 12:54:40,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 12:54:40,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:54:40,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 12:54:40,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:54:40,814 INFO L87 Difference]: Start difference. First operand 6847 states and 16809 transitions. Second operand has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 30 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:41,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:54:41,897 INFO L93 Difference]: Finished difference Result 11479 states and 28481 transitions. [2021-08-21 12:54:41,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 12:54:41,897 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 30 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-08-21 12:54:41,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:54:41,913 INFO L225 Difference]: With dead ends: 11479 [2021-08-21 12:54:41,913 INFO L226 Difference]: Without dead ends: 11391 [2021-08-21 12:54:41,913 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 1113.3ms TimeCoverageRelationStatistics Valid=258, Invalid=2192, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 12:54:41,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11391 states. [2021-08-21 12:54:42,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11391 to 6927. [2021-08-21 12:54:42,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6927 states, 6926 states have (on average 2.455818654345943) internal successors, (17009), 6926 states have internal predecessors, (17009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:42,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6927 states to 6927 states and 17009 transitions. [2021-08-21 12:54:42,024 INFO L78 Accepts]: Start accepts. Automaton has 6927 states and 17009 transitions. Word has length 59 [2021-08-21 12:54:42,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:54:42,024 INFO L470 AbstractCegarLoop]: Abstraction has 6927 states and 17009 transitions. [2021-08-21 12:54:42,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 30 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:42,024 INFO L276 IsEmpty]: Start isEmpty. Operand 6927 states and 17009 transitions. [2021-08-21 12:54:42,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-08-21 12:54:42,031 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:54:42,031 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:54:42,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2021-08-21 12:54:42,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:54:42,231 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:54:42,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:54:42,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1675715661, now seen corresponding path program 67 times [2021-08-21 12:54:42,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:54:42,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140148110] [2021-08-21 12:54:42,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:54:42,232 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:54:42,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:54:42,856 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:54:42,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:54:42,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140148110] [2021-08-21 12:54:42,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140148110] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:54:42,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638453054] [2021-08-21 12:54:42,857 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:54:42,857 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:54:42,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:54:42,858 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) [2021-08-21 12:54:42,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-08-21 12:54:48,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:54:48,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-21 12:54:48,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:54:50,810 INFO L354 Elim1Store]: treesize reduction 870, result has 2.1 percent of original size [2021-08-21 12:54:50,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 132 treesize of output 72 [2021-08-21 12:54:50,837 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:54:50,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638453054] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:54:50,838 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:54:50,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-08-21 12:54:50,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693982] [2021-08-21 12:54:50,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 12:54:50,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:54:50,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 12:54:50,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:54:50,839 INFO L87 Difference]: Start difference. First operand 6927 states and 17009 transitions. Second operand has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 30 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:51,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:54:51,961 INFO L93 Difference]: Finished difference Result 9751 states and 24089 transitions. [2021-08-21 12:54:51,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:54:51,961 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 30 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-08-21 12:54:51,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:54:51,973 INFO L225 Difference]: With dead ends: 9751 [2021-08-21 12:54:51,973 INFO L226 Difference]: Without dead ends: 9711 [2021-08-21 12:54:51,974 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 1124.3ms TimeCoverageRelationStatistics Valid=250, Invalid=2102, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 12:54:51,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9711 states. [2021-08-21 12:54:52,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9711 to 6943. [2021-08-21 12:54:52,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6943 states, 6942 states have (on average 2.4559204840103717) internal successors, (17049), 6942 states have internal predecessors, (17049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:52,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6943 states to 6943 states and 17049 transitions. [2021-08-21 12:54:52,059 INFO L78 Accepts]: Start accepts. Automaton has 6943 states and 17049 transitions. Word has length 59 [2021-08-21 12:54:52,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:54:52,060 INFO L470 AbstractCegarLoop]: Abstraction has 6943 states and 17049 transitions. [2021-08-21 12:54:52,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 30 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:52,060 INFO L276 IsEmpty]: Start isEmpty. Operand 6943 states and 17049 transitions. [2021-08-21 12:54:52,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-08-21 12:54:52,066 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:54:52,066 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:54:52,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2021-08-21 12:54:52,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:54:52,267 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:54:52,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:54:52,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1082232397, now seen corresponding path program 68 times [2021-08-21 12:54:52,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:54:52,267 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258044839] [2021-08-21 12:54:52,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:54:52,267 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:54:52,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:54:52,953 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:54:52,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:54:52,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258044839] [2021-08-21 12:54:52,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258044839] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:54:52,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104822409] [2021-08-21 12:54:52,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:54:52,954 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:54:52,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:54:52,955 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) [2021-08-21 12:54:52,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-08-21 12:54:59,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:54:59,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:54:59,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-21 12:54:59,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:55:00,946 INFO L354 Elim1Store]: treesize reduction 733, result has 2.1 percent of original size [2021-08-21 12:55:00,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 132 treesize of output 69 [2021-08-21 12:55:00,974 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:55:00,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104822409] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:55:00,974 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:55:00,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2021-08-21 12:55:00,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407009764] [2021-08-21 12:55:00,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 12:55:00,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:55:00,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 12:55:00,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=763, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:55:00,975 INFO L87 Difference]: Start difference. First operand 6943 states and 17049 transitions. Second operand has 30 states, 30 states have (on average 3.066666666666667) internal successors, (92), 29 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:02,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:55:02,715 INFO L93 Difference]: Finished difference Result 14679 states and 36633 transitions. [2021-08-21 12:55:02,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 12:55:02,716 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.066666666666667) internal successors, (92), 29 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-08-21 12:55:02,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:55:02,734 INFO L225 Difference]: With dead ends: 14679 [2021-08-21 12:55:02,735 INFO L226 Difference]: Without dead ends: 14495 [2021-08-21 12:55:02,735 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 795 ImplicationChecksByTransitivity, 1362.6ms TimeCoverageRelationStatistics Valid=316, Invalid=2876, Unknown=0, NotChecked=0, Total=3192 [2021-08-21 12:55:02,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14495 states. [2021-08-21 12:55:02,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14495 to 4415. [2021-08-21 12:55:02,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4415 states, 4414 states have (on average 2.4741730856366106) internal successors, (10921), 4414 states have internal predecessors, (10921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:02,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4415 states to 4415 states and 10921 transitions. [2021-08-21 12:55:02,825 INFO L78 Accepts]: Start accepts. Automaton has 4415 states and 10921 transitions. Word has length 59 [2021-08-21 12:55:02,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:55:02,826 INFO L470 AbstractCegarLoop]: Abstraction has 4415 states and 10921 transitions. [2021-08-21 12:55:02,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.066666666666667) internal successors, (92), 29 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:02,826 INFO L276 IsEmpty]: Start isEmpty. Operand 4415 states and 10921 transitions. [2021-08-21 12:55:02,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-08-21 12:55:02,829 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:55:02,829 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:55:02,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-08-21 12:55:03,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:55:03,030 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:55:03,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:55:03,030 INFO L82 PathProgramCache]: Analyzing trace with hash 294491059, now seen corresponding path program 69 times [2021-08-21 12:55:03,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:55:03,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209622127] [2021-08-21 12:55:03,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:55:03,030 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:55:03,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:55:03,611 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:55:03,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:55:03,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209622127] [2021-08-21 12:55:03,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209622127] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:55:03,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306875989] [2021-08-21 12:55:03,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:55:03,611 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:55:03,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:55:03,612 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) [2021-08-21 12:55:03,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-08-21 12:55:09,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-21 12:55:09,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:55:09,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 59 conjunts are in the unsatisfiable core [2021-08-21 12:55:09,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:55:12,412 INFO L354 Elim1Store]: treesize reduction 846, result has 2.2 percent of original size [2021-08-21 12:55:12,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 144 treesize of output 86 [2021-08-21 12:55:12,440 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:55:12,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306875989] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:55:12,440 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:55:12,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-08-21 12:55:12,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369840727] [2021-08-21 12:55:12,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 12:55:12,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:55:12,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 12:55:12,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=842, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:55:12,441 INFO L87 Difference]: Start difference. First operand 4415 states and 10921 transitions. Second operand has 31 states, 31 states have (on average 3.032258064516129) internal successors, (94), 30 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:16,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:55:16,741 INFO L93 Difference]: Finished difference Result 10707 states and 26583 transitions. [2021-08-21 12:55:16,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 12:55:16,741 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.032258064516129) internal successors, (94), 30 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-08-21 12:55:16,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:55:16,755 INFO L225 Difference]: With dead ends: 10707 [2021-08-21 12:55:16,755 INFO L226 Difference]: Without dead ends: 10255 [2021-08-21 12:55:16,756 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 919 ImplicationChecksByTransitivity, 2807.3ms TimeCoverageRelationStatistics Valid=407, Invalid=4149, Unknown=0, NotChecked=0, Total=4556 [2021-08-21 12:55:16,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10255 states. [2021-08-21 12:55:16,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10255 to 4735. [2021-08-21 12:55:16,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4735 states, 4734 states have (on average 2.4674693705111954) internal successors, (11681), 4734 states have internal predecessors, (11681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:16,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4735 states to 4735 states and 11681 transitions. [2021-08-21 12:55:16,829 INFO L78 Accepts]: Start accepts. Automaton has 4735 states and 11681 transitions. Word has length 59 [2021-08-21 12:55:16,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:55:16,829 INFO L470 AbstractCegarLoop]: Abstraction has 4735 states and 11681 transitions. [2021-08-21 12:55:16,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.032258064516129) internal successors, (94), 30 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:16,829 INFO L276 IsEmpty]: Start isEmpty. Operand 4735 states and 11681 transitions. [2021-08-21 12:55:16,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-08-21 12:55:16,833 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:55:16,833 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:55:16,866 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2021-08-21 12:55:17,033 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,SelfDestructingSolverStorable75 [2021-08-21 12:55:17,034 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:55:17,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:55:17,034 INFO L82 PathProgramCache]: Analyzing trace with hash -915849805, now seen corresponding path program 70 times [2021-08-21 12:55:17,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:55:17,034 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679547620] [2021-08-21 12:55:17,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:55:17,034 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:55:17,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:55:17,624 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:55:17,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:55:17,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679547620] [2021-08-21 12:55:17,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679547620] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:55:17,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039162070] [2021-08-21 12:55:17,624 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:55:17,624 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:55:17,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:55:17,625 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) [2021-08-21 12:55:17,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-08-21 12:55:24,185 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:55:24,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:55:24,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-21 12:55:24,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:55:26,017 INFO L354 Elim1Store]: treesize reduction 733, result has 2.1 percent of original size [2021-08-21 12:55:26,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 132 treesize of output 69 [2021-08-21 12:55:26,060 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:55:26,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039162070] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:55:26,060 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:55:26,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2021-08-21 12:55:26,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11700338] [2021-08-21 12:55:26,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 12:55:26,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:55:26,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 12:55:26,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:55:26,061 INFO L87 Difference]: Start difference. First operand 4735 states and 11681 transitions. Second operand has 30 states, 30 states have (on average 3.066666666666667) internal successors, (92), 29 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:27,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:55:27,475 INFO L93 Difference]: Finished difference Result 9719 states and 24233 transitions. [2021-08-21 12:55:27,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 12:55:27,475 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.066666666666667) internal successors, (92), 29 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-08-21 12:55:27,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:55:27,487 INFO L225 Difference]: With dead ends: 9719 [2021-08-21 12:55:27,487 INFO L226 Difference]: Without dead ends: 9631 [2021-08-21 12:55:27,488 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 782 ImplicationChecksByTransitivity, 1277.4ms TimeCoverageRelationStatistics Valid=328, Invalid=2864, Unknown=0, NotChecked=0, Total=3192 [2021-08-21 12:55:27,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9631 states. [2021-08-21 12:55:27,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9631 to 4335. [2021-08-21 12:55:27,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4335 states, 4334 states have (on average 2.4736963544070143) internal successors, (10721), 4334 states have internal predecessors, (10721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:27,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4335 states to 4335 states and 10721 transitions. [2021-08-21 12:55:27,553 INFO L78 Accepts]: Start accepts. Automaton has 4335 states and 10721 transitions. Word has length 59 [2021-08-21 12:55:27,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:55:27,554 INFO L470 AbstractCegarLoop]: Abstraction has 4335 states and 10721 transitions. [2021-08-21 12:55:27,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.066666666666667) internal successors, (92), 29 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:27,554 INFO L276 IsEmpty]: Start isEmpty. Operand 4335 states and 10721 transitions. [2021-08-21 12:55:27,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-08-21 12:55:27,557 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:55:27,557 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:55:27,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2021-08-21 12:55:27,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:55:27,757 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:55:27,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:55:27,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1626663501, now seen corresponding path program 71 times [2021-08-21 12:55:27,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:55:27,758 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359974018] [2021-08-21 12:55:27,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:55:27,758 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:55:27,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:55:28,410 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:55:28,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:55:28,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359974018] [2021-08-21 12:55:28,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359974018] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:55:28,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069902978] [2021-08-21 12:55:28,411 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:55:28,411 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:55:28,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:55:28,412 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) [2021-08-21 12:55:28,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-08-21 12:55:35,051 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-21 12:55:35,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:55:35,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-21 12:55:35,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:55:36,798 INFO L354 Elim1Store]: treesize reduction 1019, result has 2.1 percent of original size [2021-08-21 12:55:36,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 98 treesize of output 67 [2021-08-21 12:55:36,837 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 16 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:55:36,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069902978] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:55:36,837 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:55:36,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 31 [2021-08-21 12:55:36,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730830581] [2021-08-21 12:55:36,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-21 12:55:36,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:55:36,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-21 12:55:36,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=898, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:55:36,838 INFO L87 Difference]: Start difference. First operand 4335 states and 10721 transitions. Second operand has 32 states, 32 states have (on average 3.375) internal successors, (108), 31 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:39,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:55:39,796 INFO L93 Difference]: Finished difference Result 9115 states and 22393 transitions. [2021-08-21 12:55:39,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 12:55:39,797 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.375) internal successors, (108), 31 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-08-21 12:55:39,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:55:39,808 INFO L225 Difference]: With dead ends: 9115 [2021-08-21 12:55:39,808 INFO L226 Difference]: Without dead ends: 8575 [2021-08-21 12:55:39,808 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 808 ImplicationChecksByTransitivity, 2209.8ms TimeCoverageRelationStatistics Valid=383, Invalid=3777, Unknown=0, NotChecked=0, Total=4160 [2021-08-21 12:55:39,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8575 states. [2021-08-21 12:55:39,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8575 to 4815. [2021-08-21 12:55:39,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4815 states, 4814 states have (on average 2.4646863315330285) internal successors, (11865), 4814 states have internal predecessors, (11865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:39,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4815 states to 4815 states and 11865 transitions. [2021-08-21 12:55:39,872 INFO L78 Accepts]: Start accepts. Automaton has 4815 states and 11865 transitions. Word has length 59 [2021-08-21 12:55:39,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:55:39,872 INFO L470 AbstractCegarLoop]: Abstraction has 4815 states and 11865 transitions. [2021-08-21 12:55:39,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.375) internal successors, (108), 31 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:39,873 INFO L276 IsEmpty]: Start isEmpty. Operand 4815 states and 11865 transitions. [2021-08-21 12:55:39,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-08-21 12:55:39,876 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:55:39,876 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:55:39,910 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2021-08-21 12:55:40,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:55:40,077 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:55:40,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:55:40,077 INFO L82 PathProgramCache]: Analyzing trace with hash -846021197, now seen corresponding path program 72 times [2021-08-21 12:55:40,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:55:40,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11779818] [2021-08-21 12:55:40,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:55:40,077 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:55:40,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:55:40,737 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:55:40,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:55:40,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11779818] [2021-08-21 12:55:40,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11779818] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:55:40,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37807955] [2021-08-21 12:55:40,738 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:55:40,738 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:55:40,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:55:40,739 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) [2021-08-21 12:55:40,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-08-21 12:55:47,464 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-21 12:55:47,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:55:47,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 60 conjunts are in the unsatisfiable core [2021-08-21 12:55:47,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:55:49,404 INFO L354 Elim1Store]: treesize reduction 608, result has 2.1 percent of original size [2021-08-21 12:55:49,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 132 treesize of output 66 [2021-08-21 12:55:49,432 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:55:49,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37807955] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:55:49,432 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:55:49,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2021-08-21 12:55:49,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170967335] [2021-08-21 12:55:49,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 12:55:49,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:55:49,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 12:55:49,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:55:49,433 INFO L87 Difference]: Start difference. First operand 4815 states and 11865 transitions. Second operand has 29 states, 29 states have (on average 3.0344827586206895) internal successors, (88), 28 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:50,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:55:50,763 INFO L93 Difference]: Finished difference Result 10107 states and 25159 transitions. [2021-08-21 12:55:50,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 12:55:50,763 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.0344827586206895) internal successors, (88), 28 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-08-21 12:55:50,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:55:50,776 INFO L225 Difference]: With dead ends: 10107 [2021-08-21 12:55:50,776 INFO L226 Difference]: Without dead ends: 9935 [2021-08-21 12:55:50,776 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 1296.0ms TimeCoverageRelationStatistics Valid=273, Invalid=2277, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 12:55:50,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9935 states. [2021-08-21 12:55:50,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9935 to 5263. [2021-08-21 12:55:50,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5263 states, 5262 states have (on average 2.467692892436336) internal successors, (12985), 5262 states have internal predecessors, (12985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:50,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5263 states to 5263 states and 12985 transitions. [2021-08-21 12:55:50,862 INFO L78 Accepts]: Start accepts. Automaton has 5263 states and 12985 transitions. Word has length 59 [2021-08-21 12:55:50,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:55:50,862 INFO L470 AbstractCegarLoop]: Abstraction has 5263 states and 12985 transitions. [2021-08-21 12:55:50,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.0344827586206895) internal successors, (88), 28 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:50,863 INFO L276 IsEmpty]: Start isEmpty. Operand 5263 states and 12985 transitions. [2021-08-21 12:55:50,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-08-21 12:55:50,867 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:55:50,867 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:55:50,902 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2021-08-21 12:55:51,067 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,SelfDestructingSolverStorable78 [2021-08-21 12:55:51,068 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:55:51,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:55:51,068 INFO L82 PathProgramCache]: Analyzing trace with hash -2056362061, now seen corresponding path program 73 times [2021-08-21 12:55:51,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:55:51,068 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119768996] [2021-08-21 12:55:51,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:55:51,068 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:55:51,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:55:51,538 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:55:51,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:55:51,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119768996] [2021-08-21 12:55:51,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119768996] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:55:51,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499186110] [2021-08-21 12:55:51,538 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:55:51,538 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:55:51,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:55:51,550 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) [2021-08-21 12:55:51,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-08-21 12:55:58,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:55:58,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-21 12:55:58,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:56:00,320 INFO L354 Elim1Store]: treesize reduction 608, result has 2.1 percent of original size [2021-08-21 12:56:00,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 132 treesize of output 66 [2021-08-21 12:56:00,347 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:56:00,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499186110] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:56:00,347 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:56:00,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2021-08-21 12:56:00,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495956532] [2021-08-21 12:56:00,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 12:56:00,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:56:00,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 12:56:00,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:56:00,348 INFO L87 Difference]: Start difference. First operand 5263 states and 12985 transitions. Second operand has 29 states, 29 states have (on average 3.0344827586206895) internal successors, (88), 28 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:01,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:56:01,334 INFO L93 Difference]: Finished difference Result 8167 states and 20249 transitions. [2021-08-21 12:56:01,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 12:56:01,334 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.0344827586206895) internal successors, (88), 28 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-08-21 12:56:01,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:56:01,345 INFO L225 Difference]: With dead ends: 8167 [2021-08-21 12:56:01,345 INFO L226 Difference]: Without dead ends: 8127 [2021-08-21 12:56:01,345 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1086.3ms TimeCoverageRelationStatistics Valid=247, Invalid=2009, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 12:56:01,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8127 states. [2021-08-21 12:56:01,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8127 to 5263. [2021-08-21 12:56:01,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5263 states, 5262 states have (on average 2.467692892436336) internal successors, (12985), 5262 states have internal predecessors, (12985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:01,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5263 states to 5263 states and 12985 transitions. [2021-08-21 12:56:01,429 INFO L78 Accepts]: Start accepts. Automaton has 5263 states and 12985 transitions. Word has length 59 [2021-08-21 12:56:01,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:56:01,429 INFO L470 AbstractCegarLoop]: Abstraction has 5263 states and 12985 transitions. [2021-08-21 12:56:01,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.0344827586206895) internal successors, (88), 28 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:01,429 INFO L276 IsEmpty]: Start isEmpty. Operand 5263 states and 12985 transitions. [2021-08-21 12:56:01,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-08-21 12:56:01,434 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:56:01,434 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:56:01,468 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2021-08-21 12:56:01,635 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,SelfDestructingSolverStorable79 [2021-08-21 12:56:01,635 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:56:01,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:56:01,635 INFO L82 PathProgramCache]: Analyzing trace with hash 813369779, now seen corresponding path program 74 times [2021-08-21 12:56:01,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:56:01,635 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730765360] [2021-08-21 12:56:01,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:56:01,635 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:56:01,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:56:02,122 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:56:02,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:56:02,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730765360] [2021-08-21 12:56:02,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730765360] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:56:02,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541581204] [2021-08-21 12:56:02,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:56:02,123 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:56:02,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:56:02,123 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) [2021-08-21 12:56:02,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-08-21 12:56:09,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:56:09,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:56:09,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-21 12:56:09,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:56:10,892 INFO L354 Elim1Store]: treesize reduction 495, result has 2.0 percent of original size [2021-08-21 12:56:10,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 132 treesize of output 63 [2021-08-21 12:56:10,919 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:56:10,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541581204] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:56:10,919 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:56:10,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 27 [2021-08-21 12:56:10,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236783074] [2021-08-21 12:56:10,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 12:56:10,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:56:10,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 12:56:10,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:56:10,920 INFO L87 Difference]: Start difference. First operand 5263 states and 12985 transitions. Second operand has 28 states, 28 states have (on average 3.0) internal successors, (84), 27 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:12,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:56:12,054 INFO L93 Difference]: Finished difference Result 10383 states and 25805 transitions. [2021-08-21 12:56:12,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 12:56:12,055 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.0) internal successors, (84), 27 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-08-21 12:56:12,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:56:12,068 INFO L225 Difference]: With dead ends: 10383 [2021-08-21 12:56:12,068 INFO L226 Difference]: Without dead ends: 10319 [2021-08-21 12:56:12,068 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 1113.4ms TimeCoverageRelationStatistics Valid=262, Invalid=2090, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 12:56:12,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10319 states. [2021-08-21 12:56:12,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10319 to 5359. [2021-08-21 12:56:12,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5359 states, 5358 states have (on average 2.4682717431877568) internal successors, (13225), 5358 states have internal predecessors, (13225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:12,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5359 states to 5359 states and 13225 transitions. [2021-08-21 12:56:12,146 INFO L78 Accepts]: Start accepts. Automaton has 5359 states and 13225 transitions. Word has length 59 [2021-08-21 12:56:12,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:56:12,146 INFO L470 AbstractCegarLoop]: Abstraction has 5359 states and 13225 transitions. [2021-08-21 12:56:12,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.0) internal successors, (84), 27 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:12,146 INFO L276 IsEmpty]: Start isEmpty. Operand 5359 states and 13225 transitions. [2021-08-21 12:56:12,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-08-21 12:56:12,150 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:56:12,150 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:56:12,186 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2021-08-21 12:56:12,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:56:12,351 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:56:12,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:56:12,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1847109197, now seen corresponding path program 75 times [2021-08-21 12:56:12,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:56:12,351 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612505438] [2021-08-21 12:56:12,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:56:12,351 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:56:12,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:56:12,857 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:56:12,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:56:12,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612505438] [2021-08-21 12:56:12,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612505438] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:56:12,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949142937] [2021-08-21 12:56:12,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:56:12,858 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:56:12,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:56:12,860 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) [2021-08-21 12:56:12,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-08-21 12:56:20,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-21 12:56:20,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:56:20,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-21 12:56:20,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:56:22,323 INFO L354 Elim1Store]: treesize reduction 846, result has 2.2 percent of original size [2021-08-21 12:56:22,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 139 treesize of output 81 [2021-08-21 12:56:22,351 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 11 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:56:22,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949142937] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:56:22,351 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:56:22,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 28 [2021-08-21 12:56:22,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737004554] [2021-08-21 12:56:22,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 12:56:22,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:56:22,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 12:56:22,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:56:22,352 INFO L87 Difference]: Start difference. First operand 5359 states and 13225 transitions. Second operand has 29 states, 29 states have (on average 3.2413793103448274) internal successors, (94), 28 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:25,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:56:25,263 INFO L93 Difference]: Finished difference Result 8479 states and 20839 transitions. [2021-08-21 12:56:25,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 12:56:25,263 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.2413793103448274) internal successors, (94), 28 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-08-21 12:56:25,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:56:25,274 INFO L225 Difference]: With dead ends: 8479 [2021-08-21 12:56:25,274 INFO L226 Difference]: Without dead ends: 8031 [2021-08-21 12:56:25,275 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 2109.9ms TimeCoverageRelationStatistics Valid=328, Invalid=2752, Unknown=0, NotChecked=0, Total=3080 [2021-08-21 12:56:25,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8031 states. [2021-08-21 12:56:25,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8031 to 5855. [2021-08-21 12:56:25,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5855 states, 5854 states have (on average 2.4631021523744447) internal successors, (14419), 5854 states have internal predecessors, (14419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:25,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5855 states to 5855 states and 14419 transitions. [2021-08-21 12:56:25,342 INFO L78 Accepts]: Start accepts. Automaton has 5855 states and 14419 transitions. Word has length 59 [2021-08-21 12:56:25,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:56:25,342 INFO L470 AbstractCegarLoop]: Abstraction has 5855 states and 14419 transitions. [2021-08-21 12:56:25,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.2413793103448274) internal successors, (94), 28 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:25,342 INFO L276 IsEmpty]: Start isEmpty. Operand 5855 states and 14419 transitions. [2021-08-21 12:56:25,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-08-21 12:56:25,349 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:56:25,349 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:56:25,391 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2021-08-21 12:56:25,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:56:25,565 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:56:25,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:56:25,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1231560115, now seen corresponding path program 76 times [2021-08-21 12:56:25,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:56:25,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828104484] [2021-08-21 12:56:25,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:56:25,565 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:56:25,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:56:26,139 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:56:26,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:56:26,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828104484] [2021-08-21 12:56:26,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828104484] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:56:26,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567873509] [2021-08-21 12:56:26,139 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:56:26,139 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:56:26,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:56:26,148 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) [2021-08-21 12:56:26,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-08-21 12:56:33,405 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:56:33,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:56:33,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-21 12:56:33,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:56:34,961 INFO L354 Elim1Store]: treesize reduction 394, result has 1.7 percent of original size [2021-08-21 12:56:34,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 132 treesize of output 60 [2021-08-21 12:56:34,988 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 11 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:56:34,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567873509] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:56:34,988 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:56:34,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 24 [2021-08-21 12:56:34,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40583196] [2021-08-21 12:56:34,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 12:56:34,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:56:34,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 12:56:34,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:56:34,989 INFO L87 Difference]: Start difference. First operand 5855 states and 14419 transitions. Second operand has 25 states, 25 states have (on average 3.2) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:36,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:56:36,841 INFO L93 Difference]: Finished difference Result 8663 states and 21305 transitions. [2021-08-21 12:56:36,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 12:56:36,842 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.2) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-08-21 12:56:36,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:56:36,852 INFO L225 Difference]: With dead ends: 8663 [2021-08-21 12:56:36,852 INFO L226 Difference]: Without dead ends: 8223 [2021-08-21 12:56:36,853 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 1499.2ms TimeCoverageRelationStatistics Valid=260, Invalid=2290, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 12:56:36,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8223 states. [2021-08-21 12:56:36,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8223 to 5759. [2021-08-21 12:56:36,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5759 states, 5758 states have (on average 2.4680444598819036) internal successors, (14211), 5758 states have internal predecessors, (14211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:36,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5759 states to 5759 states and 14211 transitions. [2021-08-21 12:56:36,924 INFO L78 Accepts]: Start accepts. Automaton has 5759 states and 14211 transitions. Word has length 59 [2021-08-21 12:56:36,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:56:36,924 INFO L470 AbstractCegarLoop]: Abstraction has 5759 states and 14211 transitions. [2021-08-21 12:56:36,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.2) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:36,924 INFO L276 IsEmpty]: Start isEmpty. Operand 5759 states and 14211 transitions. [2021-08-21 12:56:36,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-08-21 12:56:36,929 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:56:36,929 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:56:36,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2021-08-21 12:56:37,129 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,SelfDestructingSolverStorable82 [2021-08-21 12:56:37,129 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:56:37,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:56:37,130 INFO L82 PathProgramCache]: Analyzing trace with hash 182903219, now seen corresponding path program 77 times [2021-08-21 12:56:37,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:56:37,130 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619556900] [2021-08-21 12:56:37,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:56:37,130 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:56:37,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:56:37,593 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:56:37,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:56:37,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619556900] [2021-08-21 12:56:37,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619556900] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:56:37,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894363170] [2021-08-21 12:56:37,594 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:56:37,594 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:56:37,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:56:37,594 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) [2021-08-21 12:56:37,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-08-21 12:56:45,150 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-21 12:56:45,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:56:45,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-21 12:56:45,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:56:47,056 INFO L354 Elim1Store]: treesize reduction 1019, result has 2.1 percent of original size [2021-08-21 12:56:47,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 98 treesize of output 67 [2021-08-21 12:56:47,094 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 19 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:56:47,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894363170] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:56:47,094 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:56:47,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 31 [2021-08-21 12:56:47,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594596301] [2021-08-21 12:56:47,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-21 12:56:47,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:56:47,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-21 12:56:47,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=894, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:56:47,095 INFO L87 Difference]: Start difference. First operand 5759 states and 14211 transitions. Second operand has 32 states, 32 states have (on average 3.375) internal successors, (108), 31 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:50,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:56:50,239 INFO L93 Difference]: Finished difference Result 11663 states and 28785 transitions. [2021-08-21 12:56:50,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-21 12:56:50,239 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.375) internal successors, (108), 31 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-08-21 12:56:50,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:56:50,254 INFO L225 Difference]: With dead ends: 11663 [2021-08-21 12:56:50,254 INFO L226 Difference]: Without dead ends: 11215 [2021-08-21 12:56:50,255 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 920 ImplicationChecksByTransitivity, 2391.7ms TimeCoverageRelationStatistics Valid=434, Invalid=4122, Unknown=0, NotChecked=0, Total=4556 [2021-08-21 12:56:50,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11215 states. [2021-08-21 12:56:50,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11215 to 7759. [2021-08-21 12:56:50,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7759 states, 7758 states have (on average 2.460814642949214) internal successors, (19091), 7758 states have internal predecessors, (19091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:50,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7759 states to 7759 states and 19091 transitions. [2021-08-21 12:56:50,358 INFO L78 Accepts]: Start accepts. Automaton has 7759 states and 19091 transitions. Word has length 59 [2021-08-21 12:56:50,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:56:50,359 INFO L470 AbstractCegarLoop]: Abstraction has 7759 states and 19091 transitions. [2021-08-21 12:56:50,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.375) internal successors, (108), 31 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:50,359 INFO L276 IsEmpty]: Start isEmpty. Operand 7759 states and 19091 transitions. [2021-08-21 12:56:50,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-08-21 12:56:50,365 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:56:50,365 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:56:50,404 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2021-08-21 12:56:50,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:56:50,566 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:56:50,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:56:50,566 INFO L82 PathProgramCache]: Analyzing trace with hash -246795341, now seen corresponding path program 78 times [2021-08-21 12:56:50,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:56:50,566 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252435003] [2021-08-21 12:56:50,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:56:50,567 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:56:50,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:56:51,071 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:56:51,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:56:51,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252435003] [2021-08-21 12:56:51,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252435003] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:56:51,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928873354] [2021-08-21 12:56:51,071 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:56:51,071 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:56:51,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:56:51,072 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) [2021-08-21 12:56:51,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-08-21 12:56:58,796 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-21 12:56:58,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:56:58,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-21 12:56:58,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:57:00,448 INFO L354 Elim1Store]: treesize reduction 394, result has 1.7 percent of original size [2021-08-21 12:57:00,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 132 treesize of output 60 [2021-08-21 12:57:00,475 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:00,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928873354] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:00,475 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:57:00,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 26 [2021-08-21 12:57:00,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485180134] [2021-08-21 12:57:00,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 12:57:00,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:57:00,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 12:57:00,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:57:00,477 INFO L87 Difference]: Start difference. First operand 7759 states and 19091 transitions. Second operand has 27 states, 27 states have (on average 2.962962962962963) internal successors, (80), 26 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:01,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:57:01,735 INFO L93 Difference]: Finished difference Result 13975 states and 34883 transitions. [2021-08-21 12:57:01,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 12:57:01,736 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.962962962962963) internal successors, (80), 26 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-08-21 12:57:01,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:57:01,754 INFO L225 Difference]: With dead ends: 13975 [2021-08-21 12:57:01,755 INFO L226 Difference]: Without dead ends: 13743 [2021-08-21 12:57:01,755 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 45 SyntacticMatches, 6 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 1109.9ms TimeCoverageRelationStatistics Valid=259, Invalid=1997, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 12:57:01,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13743 states. [2021-08-21 12:57:01,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13743 to 7839. [2021-08-21 12:57:01,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7839 states, 7838 states have (on average 2.461214595560092) internal successors, (19291), 7838 states have internal predecessors, (19291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:01,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7839 states to 7839 states and 19291 transitions. [2021-08-21 12:57:01,863 INFO L78 Accepts]: Start accepts. Automaton has 7839 states and 19291 transitions. Word has length 59 [2021-08-21 12:57:01,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:57:01,863 INFO L470 AbstractCegarLoop]: Abstraction has 7839 states and 19291 transitions. [2021-08-21 12:57:01,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.962962962962963) internal successors, (80), 26 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:01,863 INFO L276 IsEmpty]: Start isEmpty. Operand 7839 states and 19291 transitions. [2021-08-21 12:57:01,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-08-21 12:57:01,870 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:57:01,870 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:57:01,908 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2021-08-21 12:57:02,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:02,071 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:57:02,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:57:02,071 INFO L82 PathProgramCache]: Analyzing trace with hash 364217267, now seen corresponding path program 79 times [2021-08-21 12:57:02,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:57:02,071 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446931685] [2021-08-21 12:57:02,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:57:02,072 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:57:02,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:02,608 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:02,608 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:57:02,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446931685] [2021-08-21 12:57:02,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446931685] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:02,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887761334] [2021-08-21 12:57:02,608 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:57:02,608 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:02,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:57:02,609 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) [2021-08-21 12:57:02,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-08-21 12:57:10,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:10,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-21 12:57:10,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:57:12,038 INFO L354 Elim1Store]: treesize reduction 306, result has 1.0 percent of original size [2021-08-21 12:57:12,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 132 treesize of output 57 [2021-08-21 12:57:12,065 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 11 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:12,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887761334] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:12,065 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:57:12,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 23 [2021-08-21 12:57:12,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841778266] [2021-08-21 12:57:12,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 12:57:12,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:57:12,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 12:57:12,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:57:12,066 INFO L87 Difference]: Start difference. First operand 7839 states and 19291 transitions. Second operand has 24 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 23 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:13,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:57:13,793 INFO L93 Difference]: Finished difference Result 10711 states and 26373 transitions. [2021-08-21 12:57:13,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 12:57:13,793 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 23 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-08-21 12:57:13,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:57:13,807 INFO L225 Difference]: With dead ends: 10711 [2021-08-21 12:57:13,807 INFO L226 Difference]: Without dead ends: 10287 [2021-08-21 12:57:13,808 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 47 SyntacticMatches, 7 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 1518.7ms TimeCoverageRelationStatistics Valid=275, Invalid=2077, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 12:57:13,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10287 states. [2021-08-21 12:57:13,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10287 to 8271. [2021-08-21 12:57:13,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8271 states, 8270 states have (on average 2.462273276904474) internal successors, (20363), 8270 states have internal predecessors, (20363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:13,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8271 states to 8271 states and 20363 transitions. [2021-08-21 12:57:13,912 INFO L78 Accepts]: Start accepts. Automaton has 8271 states and 20363 transitions. Word has length 59 [2021-08-21 12:57:13,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:57:13,912 INFO L470 AbstractCegarLoop]: Abstraction has 8271 states and 20363 transitions. [2021-08-21 12:57:13,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 23 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:13,912 INFO L276 IsEmpty]: Start isEmpty. Operand 8271 states and 20363 transitions. [2021-08-21 12:57:13,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-08-21 12:57:13,920 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:57:13,920 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:57:13,957 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2021-08-21 12:57:14,120 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,SelfDestructingSolverStorable85 [2021-08-21 12:57:14,121 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:57:14,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:57:14,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1356541363, now seen corresponding path program 80 times [2021-08-21 12:57:14,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:57:14,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517278488] [2021-08-21 12:57:14,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:57:14,121 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:57:14,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:14,605 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:14,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:57:14,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517278488] [2021-08-21 12:57:14,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517278488] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:14,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25023655] [2021-08-21 12:57:14,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:57:14,606 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:14,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:57:14,608 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) [2021-08-21 12:57:14,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-08-21 12:57:22,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:57:22,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:57:22,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-21 12:57:22,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:57:24,054 INFO L354 Elim1Store]: treesize reduction 306, result has 1.0 percent of original size [2021-08-21 12:57:24,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 132 treesize of output 57 [2021-08-21 12:57:24,080 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:24,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25023655] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:24,080 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:57:24,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 23 [2021-08-21 12:57:24,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518335997] [2021-08-21 12:57:24,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 12:57:24,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:57:24,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 12:57:24,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:57:24,081 INFO L87 Difference]: Start difference. First operand 8271 states and 20363 transitions. Second operand has 24 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 23 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:25,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:57:25,110 INFO L93 Difference]: Finished difference Result 13623 states and 33843 transitions. [2021-08-21 12:57:25,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 12:57:25,110 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 23 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-08-21 12:57:25,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:57:25,130 INFO L225 Difference]: With dead ends: 13623 [2021-08-21 12:57:25,130 INFO L226 Difference]: Without dead ends: 13535 [2021-08-21 12:57:25,131 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 47 SyntacticMatches, 7 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 988.5ms TimeCoverageRelationStatistics Valid=205, Invalid=1687, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 12:57:25,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13535 states. [2021-08-21 12:57:25,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13535 to 8191. [2021-08-21 12:57:25,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8191 states, 8190 states have (on average 2.461904761904762) internal successors, (20163), 8190 states have internal predecessors, (20163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:25,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8191 states to 8191 states and 20163 transitions. [2021-08-21 12:57:25,302 INFO L78 Accepts]: Start accepts. Automaton has 8191 states and 20163 transitions. Word has length 59 [2021-08-21 12:57:25,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:57:25,302 INFO L470 AbstractCegarLoop]: Abstraction has 8191 states and 20163 transitions. [2021-08-21 12:57:25,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 23 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:25,302 INFO L276 IsEmpty]: Start isEmpty. Operand 8191 states and 20163 transitions. [2021-08-21 12:57:25,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-08-21 12:57:25,309 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:57:25,309 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:57:25,347 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2021-08-21 12:57:25,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:25,509 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:57:25,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:57:25,510 INFO L82 PathProgramCache]: Analyzing trace with hash -713096781, now seen corresponding path program 81 times [2021-08-21 12:57:25,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:57:25,510 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889416994] [2021-08-21 12:57:25,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:57:25,510 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:57:25,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:26,039 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:26,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:57:26,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889416994] [2021-08-21 12:57:26,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889416994] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:26,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7429754] [2021-08-21 12:57:26,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:57:26,039 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:26,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:57:26,041 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) [2021-08-21 12:57:26,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-08-21 12:57:34,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-21 12:57:34,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:57:34,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-21 12:57:34,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:57:35,669 INFO L354 Elim1Store]: treesize reduction 306, result has 1.0 percent of original size [2021-08-21 12:57:35,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 132 treesize of output 57 [2021-08-21 12:57:35,697 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:35,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7429754] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:35,697 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:57:35,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 24 [2021-08-21 12:57:35,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610653851] [2021-08-21 12:57:35,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 12:57:35,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:57:35,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 12:57:35,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:57:35,699 INFO L87 Difference]: Start difference. First operand 8191 states and 20163 transitions. Second operand has 25 states, 25 states have (on average 3.04) internal successors, (76), 24 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:36,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:57:36,868 INFO L93 Difference]: Finished difference Result 16023 states and 39819 transitions. [2021-08-21 12:57:36,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 12:57:36,871 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.04) internal successors, (76), 24 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-08-21 12:57:36,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:57:36,894 INFO L225 Difference]: With dead ends: 16023 [2021-08-21 12:57:36,894 INFO L226 Difference]: Without dead ends: 15935 [2021-08-21 12:57:36,894 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 46 SyntacticMatches, 7 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 1075.4ms TimeCoverageRelationStatistics Valid=239, Invalid=1831, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 12:57:36,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15935 states. [2021-08-21 12:57:37,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15935 to 8223. [2021-08-21 12:57:37,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8223 states, 8222 states have (on average 2.4620530284602284) internal successors, (20243), 8222 states have internal predecessors, (20243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:37,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8223 states to 8223 states and 20243 transitions. [2021-08-21 12:57:37,024 INFO L78 Accepts]: Start accepts. Automaton has 8223 states and 20243 transitions. Word has length 59 [2021-08-21 12:57:37,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:57:37,024 INFO L470 AbstractCegarLoop]: Abstraction has 8223 states and 20243 transitions. [2021-08-21 12:57:37,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.04) internal successors, (76), 24 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:37,024 INFO L276 IsEmpty]: Start isEmpty. Operand 8223 states and 20243 transitions. [2021-08-21 12:57:37,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-08-21 12:57:37,031 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:57:37,031 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:57:37,070 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2021-08-21 12:57:37,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:37,232 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:57:37,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:57:37,232 INFO L82 PathProgramCache]: Analyzing trace with hash -65481293, now seen corresponding path program 82 times [2021-08-21 12:57:37,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:57:37,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849819135] [2021-08-21 12:57:37,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:57:37,232 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:57:37,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:37,964 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:37,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:57:37,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849819135] [2021-08-21 12:57:37,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849819135] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:37,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274402554] [2021-08-21 12:57:37,965 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:57:37,965 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:37,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:57:37,966 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) [2021-08-21 12:57:37,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-08-21 12:57:46,041 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:57:46,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:57:46,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-21 12:57:46,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:57:47,613 INFO L354 Elim1Store]: treesize reduction 306, result has 1.0 percent of original size [2021-08-21 12:57:47,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 132 treesize of output 57 [2021-08-21 12:57:47,641 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:47,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274402554] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:47,641 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:57:47,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 25 [2021-08-21 12:57:47,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466858260] [2021-08-21 12:57:47,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 12:57:47,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:57:47,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 12:57:47,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:57:47,642 INFO L87 Difference]: Start difference. First operand 8223 states and 20243 transitions. Second operand has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 25 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:48,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:57:48,821 INFO L93 Difference]: Finished difference Result 14087 states and 34947 transitions. [2021-08-21 12:57:48,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 12:57:48,822 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 25 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-08-21 12:57:48,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:57:48,841 INFO L225 Difference]: With dead ends: 14087 [2021-08-21 12:57:48,841 INFO L226 Difference]: Without dead ends: 13999 [2021-08-21 12:57:48,842 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 45 SyntacticMatches, 7 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1198.4ms TimeCoverageRelationStatistics Valid=252, Invalid=1910, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 12:57:48,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13999 states. [2021-08-21 12:57:48,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13999 to 8223. [2021-08-21 12:57:48,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8223 states, 8222 states have (on average 2.4620530284602284) internal successors, (20243), 8222 states have internal predecessors, (20243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:48,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8223 states to 8223 states and 20243 transitions. [2021-08-21 12:57:48,960 INFO L78 Accepts]: Start accepts. Automaton has 8223 states and 20243 transitions. Word has length 59 [2021-08-21 12:57:48,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:57:48,960 INFO L470 AbstractCegarLoop]: Abstraction has 8223 states and 20243 transitions. [2021-08-21 12:57:48,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 25 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:48,960 INFO L276 IsEmpty]: Start isEmpty. Operand 8223 states and 20243 transitions. [2021-08-21 12:57:48,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-08-21 12:57:48,967 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:57:48,967 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:57:49,004 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2021-08-21 12:57:49,168 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,SelfDestructingSolverStorable88 [2021-08-21 12:57:49,168 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:57:49,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:57:49,168 INFO L82 PathProgramCache]: Analyzing trace with hash 733085619, now seen corresponding path program 83 times [2021-08-21 12:57:49,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:57:49,168 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137112356] [2021-08-21 12:57:49,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:57:49,169 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:57:49,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:49,724 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:49,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:57:49,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137112356] [2021-08-21 12:57:49,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137112356] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:49,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107110189] [2021-08-21 12:57:49,725 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:57:49,725 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:49,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:57:49,725 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) [2021-08-21 12:57:49,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-08-21 12:57:58,039 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-21 12:57:58,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:57:58,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-21 12:57:58,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:57:59,416 INFO L354 Elim1Store]: treesize reduction 240, result has 0.4 percent of original size [2021-08-21 12:57:59,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 126 treesize of output 48 [2021-08-21 12:57:59,442 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:59,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107110189] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:59,442 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:57:59,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 24 [2021-08-21 12:57:59,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141651706] [2021-08-21 12:57:59,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 12:57:59,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:57:59,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 12:57:59,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:57:59,443 INFO L87 Difference]: Start difference. First operand 8223 states and 20243 transitions. Second operand has 25 states, 25 states have (on average 2.88) internal successors, (72), 24 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:00,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:58:00,618 INFO L93 Difference]: Finished difference Result 12195 states and 30135 transitions. [2021-08-21 12:58:00,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 12:58:00,619 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.88) internal successors, (72), 24 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-08-21 12:58:00,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:58:00,634 INFO L225 Difference]: With dead ends: 12195 [2021-08-21 12:58:00,634 INFO L226 Difference]: Without dead ends: 12159 [2021-08-21 12:58:00,634 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 45 SyntacticMatches, 8 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 983.0ms TimeCoverageRelationStatistics Valid=233, Invalid=1747, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 12:58:00,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12159 states. [2021-08-21 12:58:00,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12159 to 8255. [2021-08-21 12:58:00,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8255 states, 8254 states have (on average 2.462200145384056) internal successors, (20323), 8254 states have internal predecessors, (20323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:00,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8255 states to 8255 states and 20323 transitions. [2021-08-21 12:58:00,744 INFO L78 Accepts]: Start accepts. Automaton has 8255 states and 20323 transitions. Word has length 59 [2021-08-21 12:58:00,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:58:00,744 INFO L470 AbstractCegarLoop]: Abstraction has 8255 states and 20323 transitions. [2021-08-21 12:58:00,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.88) internal successors, (72), 24 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:00,744 INFO L276 IsEmpty]: Start isEmpty. Operand 8255 states and 20323 transitions. [2021-08-21 12:58:00,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-08-21 12:58:00,752 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:58:00,752 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:58:00,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2021-08-21 12:58:00,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:00,952 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:58:00,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:58:00,953 INFO L82 PathProgramCache]: Analyzing trace with hash -2098353739, now seen corresponding path program 84 times [2021-08-21 12:58:00,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:58:00,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392303152] [2021-08-21 12:58:00,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:58:00,953 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:58:00,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:58:01,052 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 64 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:58:01,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:58:01,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392303152] [2021-08-21 12:58:01,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392303152] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:01,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523336790] [2021-08-21 12:58:01,053 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:58:01,053 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:01,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:58:01,054 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) [2021-08-21 12:58:01,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-08-21 12:58:09,498 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-08-21 12:58:09,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:58:09,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:58:09,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:58:09,663 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 64 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:58:09,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523336790] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:09,664 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:58:09,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 12:58:09,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267348505] [2021-08-21 12:58:09,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:58:09,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:58:09,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:58:09,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:58:09,664 INFO L87 Difference]: Start difference. First operand 8255 states and 20323 transitions. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 10 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) [2021-08-21 12:58:09,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:58:09,723 INFO L93 Difference]: Finished difference Result 10095 states and 24763 transitions. [2021-08-21 12:58:09,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:58:09,723 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 10 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) Word has length 61 [2021-08-21 12:58:09,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:58:09,734 INFO L225 Difference]: With dead ends: 10095 [2021-08-21 12:58:09,734 INFO L226 Difference]: Without dead ends: 10087 [2021-08-21 12:58:09,735 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 38.5ms TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:58:09,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10087 states. [2021-08-21 12:58:09,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10087 to 8511. [2021-08-21 12:58:09,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8511 states, 8510 states have (on average 2.465217391304348) internal successors, (20979), 8510 states have internal predecessors, (20979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:09,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8511 states to 8511 states and 20979 transitions. [2021-08-21 12:58:09,845 INFO L78 Accepts]: Start accepts. Automaton has 8511 states and 20979 transitions. Word has length 61 [2021-08-21 12:58:09,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:58:09,845 INFO L470 AbstractCegarLoop]: Abstraction has 8511 states and 20979 transitions. [2021-08-21 12:58:09,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 10 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) [2021-08-21 12:58:09,845 INFO L276 IsEmpty]: Start isEmpty. Operand 8511 states and 20979 transitions. [2021-08-21 12:58:09,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-08-21 12:58:09,853 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:58:09,854 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:58:09,894 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2021-08-21 12:58:10,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:10,054 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:58:10,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:58:10,054 INFO L82 PathProgramCache]: Analyzing trace with hash -462486481, now seen corresponding path program 85 times [2021-08-21 12:58:10,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:58:10,055 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994681031] [2021-08-21 12:58:10,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:58:10,055 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:58:10,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:58:10,618 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 8 proven. 144 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:58:10,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:58:10,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994681031] [2021-08-21 12:58:10,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994681031] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:10,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216000632] [2021-08-21 12:58:10,618 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:58:10,618 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:10,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:58:10,619 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) [2021-08-21 12:58:10,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-08-21 12:58:19,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:58:19,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-21 12:58:19,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:58:20,737 INFO L354 Elim1Store]: treesize reduction 394, result has 1.7 percent of original size [2021-08-21 12:58:20,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 132 treesize of output 60 [2021-08-21 12:58:20,764 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 8 proven. 144 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:58:20,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216000632] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:20,764 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:58:20,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 25 [2021-08-21 12:58:20,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584970918] [2021-08-21 12:58:20,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 12:58:20,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:58:20,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 12:58:20,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:58:20,765 INFO L87 Difference]: Start difference. First operand 8511 states and 20979 transitions. Second operand has 26 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 25 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) [2021-08-21 12:58:23,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:58:23,074 INFO L93 Difference]: Finished difference Result 16635 states and 41563 transitions. [2021-08-21 12:58:23,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 12:58:23,075 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 25 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) Word has length 63 [2021-08-21 12:58:23,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:58:23,138 INFO L225 Difference]: With dead ends: 16635 [2021-08-21 12:58:23,138 INFO L226 Difference]: Without dead ends: 16431 [2021-08-21 12:58:23,138 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 50 SyntacticMatches, 6 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1008 ImplicationChecksByTransitivity, 2129.6ms TimeCoverageRelationStatistics Valid=449, Invalid=3457, Unknown=0, NotChecked=0, Total=3906 [2021-08-21 12:58:23,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16431 states. [2021-08-21 12:58:23,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16431 to 8655. [2021-08-21 12:58:23,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8655 states, 8654 states have (on average 2.4657961636237578) internal successors, (21339), 8654 states have internal predecessors, (21339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:23,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8655 states to 8655 states and 21339 transitions. [2021-08-21 12:58:23,261 INFO L78 Accepts]: Start accepts. Automaton has 8655 states and 21339 transitions. Word has length 63 [2021-08-21 12:58:23,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:58:23,262 INFO L470 AbstractCegarLoop]: Abstraction has 8655 states and 21339 transitions. [2021-08-21 12:58:23,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 25 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) [2021-08-21 12:58:23,262 INFO L276 IsEmpty]: Start isEmpty. Operand 8655 states and 21339 transitions. [2021-08-21 12:58:23,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-21 12:58:23,270 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:58:23,270 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:58:23,308 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2021-08-21 12:58:23,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:23,471 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:58:23,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:58:23,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1024399567, now seen corresponding path program 86 times [2021-08-21 12:58:23,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:58:23,471 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070984052] [2021-08-21 12:58:23,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:58:23,472 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:58:23,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:58:23,990 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:58:23,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:58:23,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070984052] [2021-08-21 12:58:23,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070984052] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:23,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102029647] [2021-08-21 12:58:23,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:58:23,991 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:23,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:58:23,991 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) [2021-08-21 12:58:23,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-08-21 12:58:32,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:58:32,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:58:32,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-08-21 12:58:32,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:58:35,162 INFO L354 Elim1Store]: treesize reduction 1183, result has 1.8 percent of original size [2021-08-21 12:58:35,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 0 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 105 case distinctions, treesize of input 151 treesize of output 82 [2021-08-21 12:58:35,189 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:58:35,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102029647] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:35,190 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:58:35,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 33 [2021-08-21 12:58:35,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543453440] [2021-08-21 12:58:35,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-21 12:58:35,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:58:35,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-21 12:58:35,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=997, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 12:58:35,190 INFO L87 Difference]: Start difference. First operand 8655 states and 21339 transitions. Second operand has 34 states, 34 states have (on average 3.176470588235294) internal successors, (108), 33 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:37,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:58:37,012 INFO L93 Difference]: Finished difference Result 20631 states and 51563 transitions. [2021-08-21 12:58:37,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 12:58:37,012 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.176470588235294) internal successors, (108), 33 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-08-21 12:58:37,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:58:37,042 INFO L225 Difference]: With dead ends: 20631 [2021-08-21 12:58:37,042 INFO L226 Difference]: Without dead ends: 20399 [2021-08-21 12:58:37,043 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 967 ImplicationChecksByTransitivity, 1485.6ms TimeCoverageRelationStatistics Valid=342, Invalid=3318, Unknown=0, NotChecked=0, Total=3660 [2021-08-21 12:58:37,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20399 states. [2021-08-21 12:58:37,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20399 to 9487. [2021-08-21 12:58:37,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9487 states, 9486 states have (on average 2.4637360320472275) internal successors, (23371), 9486 states have internal predecessors, (23371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:37,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9487 states to 9487 states and 23371 transitions. [2021-08-21 12:58:37,208 INFO L78 Accepts]: Start accepts. Automaton has 9487 states and 23371 transitions. Word has length 65 [2021-08-21 12:58:37,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:58:37,208 INFO L470 AbstractCegarLoop]: Abstraction has 9487 states and 23371 transitions. [2021-08-21 12:58:37,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.176470588235294) internal successors, (108), 33 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:37,208 INFO L276 IsEmpty]: Start isEmpty. Operand 9487 states and 23371 transitions. [2021-08-21 12:58:37,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-21 12:58:37,217 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:58:37,217 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:58:37,259 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2021-08-21 12:58:37,418 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,SelfDestructingSolverStorable92 [2021-08-21 12:58:37,418 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:58:37,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:58:37,418 INFO L82 PathProgramCache]: Analyzing trace with hash 769722673, now seen corresponding path program 87 times [2021-08-21 12:58:37,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:58:37,419 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425260381] [2021-08-21 12:58:37,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:58:37,419 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:58:37,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:58:38,056 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:58:38,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:58:38,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425260381] [2021-08-21 12:58:38,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425260381] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:38,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234339824] [2021-08-21 12:58:38,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:58:38,057 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:38,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:58:38,058 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) [2021-08-21 12:58:38,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-08-21 12:58:46,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-21 12:58:46,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:58:46,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-08-21 12:58:46,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:58:49,493 INFO L354 Elim1Store]: treesize reduction 1183, result has 1.8 percent of original size [2021-08-21 12:58:49,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 0 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 105 case distinctions, treesize of input 151 treesize of output 82 [2021-08-21 12:58:49,521 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:58:49,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234339824] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:49,521 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:58:49,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 33 [2021-08-21 12:58:49,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280088953] [2021-08-21 12:58:49,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-21 12:58:49,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:58:49,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-21 12:58:49,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=995, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 12:58:49,522 INFO L87 Difference]: Start difference. First operand 9487 states and 23371 transitions. Second operand has 34 states, 34 states have (on average 3.176470588235294) internal successors, (108), 33 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:50,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:58:50,963 INFO L93 Difference]: Finished difference Result 18727 states and 46467 transitions. [2021-08-21 12:58:50,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 12:58:50,966 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.176470588235294) internal successors, (108), 33 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-08-21 12:58:50,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:58:50,993 INFO L225 Difference]: With dead ends: 18727 [2021-08-21 12:58:50,993 INFO L226 Difference]: Without dead ends: 18687 [2021-08-21 12:58:50,994 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 969 ImplicationChecksByTransitivity, 1612.5ms TimeCoverageRelationStatistics Valid=348, Invalid=3312, Unknown=0, NotChecked=0, Total=3660 [2021-08-21 12:58:51,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18687 states. [2021-08-21 12:58:51,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18687 to 9711. [2021-08-21 12:58:51,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9711 states, 9710 states have (on average 2.464572605561277) internal successors, (23931), 9710 states have internal predecessors, (23931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:51,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9711 states to 9711 states and 23931 transitions. [2021-08-21 12:58:51,154 INFO L78 Accepts]: Start accepts. Automaton has 9711 states and 23931 transitions. Word has length 65 [2021-08-21 12:58:51,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:58:51,154 INFO L470 AbstractCegarLoop]: Abstraction has 9711 states and 23931 transitions. [2021-08-21 12:58:51,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.176470588235294) internal successors, (108), 33 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:51,154 INFO L276 IsEmpty]: Start isEmpty. Operand 9711 states and 23931 transitions. [2021-08-21 12:58:51,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-21 12:58:51,164 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:58:51,164 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:58:51,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2021-08-21 12:58:51,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:51,368 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:58:51,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:58:51,368 INFO L82 PathProgramCache]: Analyzing trace with hash -220427983, now seen corresponding path program 88 times [2021-08-21 12:58:51,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:58:51,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773714848] [2021-08-21 12:58:51,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:58:51,369 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:58:51,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:58:52,060 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:58:52,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:58:52,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773714848] [2021-08-21 12:58:52,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773714848] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:52,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119145376] [2021-08-21 12:58:52,060 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:58:52,060 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:52,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:58:52,061 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) [2021-08-21 12:58:52,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-08-21 12:59:00,975 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:59:00,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:59:00,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-08-21 12:59:00,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:59:03,506 INFO L354 Elim1Store]: treesize reduction 1183, result has 1.8 percent of original size [2021-08-21 12:59:03,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 0 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 105 case distinctions, treesize of input 151 treesize of output 82 [2021-08-21 12:59:03,533 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:59:03,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119145376] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:03,533 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:59:03,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 34 [2021-08-21 12:59:03,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517911695] [2021-08-21 12:59:03,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-21 12:59:03,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:59:03,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-21 12:59:03,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1060, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:59:03,534 INFO L87 Difference]: Start difference. First operand 9711 states and 23931 transitions. Second operand has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:05,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:59:05,392 INFO L93 Difference]: Finished difference Result 20631 states and 51571 transitions. [2021-08-21 12:59:05,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 12:59:05,393 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-08-21 12:59:05,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:59:05,419 INFO L225 Difference]: With dead ends: 20631 [2021-08-21 12:59:05,419 INFO L226 Difference]: Without dead ends: 20399 [2021-08-21 12:59:05,420 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 1565.0ms TimeCoverageRelationStatistics Valid=348, Invalid=3434, Unknown=0, NotChecked=0, Total=3782 [2021-08-21 12:59:05,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20399 states. [2021-08-21 12:59:05,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20399 to 8527. [2021-08-21 12:59:05,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8527 states, 8526 states have (on average 2.461529439361952) internal successors, (20987), 8526 states have internal predecessors, (20987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:05,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8527 states to 8527 states and 20987 transitions. [2021-08-21 12:59:05,573 INFO L78 Accepts]: Start accepts. Automaton has 8527 states and 20987 transitions. Word has length 65 [2021-08-21 12:59:05,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:59:05,573 INFO L470 AbstractCegarLoop]: Abstraction has 8527 states and 20987 transitions. [2021-08-21 12:59:05,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:05,574 INFO L276 IsEmpty]: Start isEmpty. Operand 8527 states and 20987 transitions. [2021-08-21 12:59:05,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-21 12:59:05,582 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:59:05,582 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:59:05,623 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2021-08-21 12:59:05,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:59:05,782 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:59:05,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:59:05,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1573694257, now seen corresponding path program 89 times [2021-08-21 12:59:05,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:59:05,783 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936246928] [2021-08-21 12:59:05,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:59:05,783 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:59:05,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:59:06,550 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:59:06,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:59:06,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936246928] [2021-08-21 12:59:06,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936246928] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:06,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326271928] [2021-08-21 12:59:06,550 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:59:06,550 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:59:06,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:59:06,552 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) [2021-08-21 12:59:06,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-08-21 12:59:15,675 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-21 12:59:15,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:59:15,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 68 conjunts are in the unsatisfiable core [2021-08-21 12:59:15,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:59:18,205 INFO L354 Elim1Store]: treesize reduction 1183, result has 1.8 percent of original size [2021-08-21 12:59:18,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 0 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 105 case distinctions, treesize of input 151 treesize of output 82 [2021-08-21 12:59:18,247 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:59:18,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326271928] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:18,248 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:59:18,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 34 [2021-08-21 12:59:18,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189219097] [2021-08-21 12:59:18,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-21 12:59:18,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:59:18,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-21 12:59:18,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1058, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:59:18,248 INFO L87 Difference]: Start difference. First operand 8527 states and 20987 transitions. Second operand has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:20,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:59:20,248 INFO L93 Difference]: Finished difference Result 17935 states and 44615 transitions. [2021-08-21 12:59:20,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 12:59:20,249 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-08-21 12:59:20,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:59:20,275 INFO L225 Difference]: With dead ends: 17935 [2021-08-21 12:59:20,275 INFO L226 Difference]: Without dead ends: 17439 [2021-08-21 12:59:20,275 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 975 ImplicationChecksByTransitivity, 1762.3ms TimeCoverageRelationStatistics Valid=354, Invalid=3428, Unknown=0, NotChecked=0, Total=3782 [2021-08-21 12:59:20,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17439 states. [2021-08-21 12:59:20,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17439 to 8911. [2021-08-21 12:59:20,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8911 states, 8910 states have (on average 2.4631874298540963) internal successors, (21947), 8910 states have internal predecessors, (21947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:20,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8911 states to 8911 states and 21947 transitions. [2021-08-21 12:59:20,441 INFO L78 Accepts]: Start accepts. Automaton has 8911 states and 21947 transitions. Word has length 65 [2021-08-21 12:59:20,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:59:20,441 INFO L470 AbstractCegarLoop]: Abstraction has 8911 states and 21947 transitions. [2021-08-21 12:59:20,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:20,441 INFO L276 IsEmpty]: Start isEmpty. Operand 8911 states and 21947 transitions. [2021-08-21 12:59:20,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-21 12:59:20,449 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:59:20,449 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:59:20,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2021-08-21 12:59:20,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:59:20,650 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:59:20,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:59:20,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1861670193, now seen corresponding path program 90 times [2021-08-21 12:59:20,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:59:20,651 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139999662] [2021-08-21 12:59:20,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:59:20,651 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:59:20,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:59:21,224 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:59:21,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:59:21,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139999662] [2021-08-21 12:59:21,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139999662] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:21,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519103375] [2021-08-21 12:59:21,224 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:59:21,224 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:59:21,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:59:21,225 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) [2021-08-21 12:59:21,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-08-21 12:59:30,657 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-21 12:59:30,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:59:30,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-08-21 12:59:30,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:59:33,130 INFO L354 Elim1Store]: treesize reduction 1183, result has 1.8 percent of original size [2021-08-21 12:59:33,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 0 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 105 case distinctions, treesize of input 151 treesize of output 82 [2021-08-21 12:59:33,157 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:59:33,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519103375] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:33,157 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:59:33,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 34 [2021-08-21 12:59:33,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689421716] [2021-08-21 12:59:33,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-21 12:59:33,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:59:33,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-21 12:59:33,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1058, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:59:33,158 INFO L87 Difference]: Start difference. First operand 8911 states and 21947 transitions. Second operand has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:34,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:59:34,821 INFO L93 Difference]: Finished difference Result 16191 states and 40111 transitions. [2021-08-21 12:59:34,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 12:59:34,821 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-08-21 12:59:34,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:59:34,844 INFO L225 Difference]: With dead ends: 16191 [2021-08-21 12:59:34,844 INFO L226 Difference]: Without dead ends: 16127 [2021-08-21 12:59:34,845 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 776 ImplicationChecksByTransitivity, 1442.4ms TimeCoverageRelationStatistics Valid=303, Invalid=2889, Unknown=0, NotChecked=0, Total=3192 [2021-08-21 12:59:34,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16127 states. [2021-08-21 12:59:34,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16127 to 9391. [2021-08-21 12:59:34,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9391 states, 9390 states have (on average 2.4582534611288605) internal successors, (23083), 9390 states have internal predecessors, (23083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:34,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9391 states to 9391 states and 23083 transitions. [2021-08-21 12:59:34,989 INFO L78 Accepts]: Start accepts. Automaton has 9391 states and 23083 transitions. Word has length 65 [2021-08-21 12:59:34,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:59:34,989 INFO L470 AbstractCegarLoop]: Abstraction has 9391 states and 23083 transitions. [2021-08-21 12:59:34,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:34,989 INFO L276 IsEmpty]: Start isEmpty. Operand 9391 states and 23083 transitions. [2021-08-21 12:59:34,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-21 12:59:34,999 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:59:34,999 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:59:35,042 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2021-08-21 12:59:35,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:59:35,199 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:59:35,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:59:35,199 INFO L82 PathProgramCache]: Analyzing trace with hash -244396751, now seen corresponding path program 91 times [2021-08-21 12:59:35,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:59:35,200 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348989534] [2021-08-21 12:59:35,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:59:35,200 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:59:35,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:59:35,762 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 155 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 12:59:35,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:59:35,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348989534] [2021-08-21 12:59:35,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348989534] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:35,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464136439] [2021-08-21 12:59:35,762 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:59:35,762 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:59:35,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:59:35,765 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) [2021-08-21 12:59:35,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-08-21 12:59:45,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:59:45,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-08-21 12:59:45,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:59:47,718 INFO L354 Elim1Store]: treesize reduction 1183, result has 1.8 percent of original size [2021-08-21 12:59:47,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 0 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 105 case distinctions, treesize of input 151 treesize of output 82 [2021-08-21 12:59:47,746 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 13 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:59:47,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464136439] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:47,746 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:59:47,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 20] total 30 [2021-08-21 12:59:47,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687152513] [2021-08-21 12:59:47,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 12:59:47,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:59:47,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 12:59:47,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:59:47,747 INFO L87 Difference]: Start difference. First operand 9391 states and 23083 transitions. Second operand has 31 states, 31 states have (on average 3.3548387096774195) internal successors, (104), 30 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:49,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:59:49,813 INFO L93 Difference]: Finished difference Result 14183 states and 34945 transitions. [2021-08-21 12:59:49,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 12:59:49,814 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.3548387096774195) internal successors, (104), 30 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-08-21 12:59:49,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:59:49,831 INFO L225 Difference]: With dead ends: 14183 [2021-08-21 12:59:49,831 INFO L226 Difference]: Without dead ends: 13743 [2021-08-21 12:59:49,831 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 1694.3ms TimeCoverageRelationStatistics Valid=299, Invalid=2893, Unknown=0, NotChecked=0, Total=3192 [2021-08-21 12:59:49,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13743 states. [2021-08-21 12:59:49,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13743 to 10623. [2021-08-21 12:59:49,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10623 states, 10622 states have (on average 2.4585765392581433) internal successors, (26115), 10622 states have internal predecessors, (26115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:49,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10623 states to 10623 states and 26115 transitions. [2021-08-21 12:59:49,967 INFO L78 Accepts]: Start accepts. Automaton has 10623 states and 26115 transitions. Word has length 65 [2021-08-21 12:59:49,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:59:49,967 INFO L470 AbstractCegarLoop]: Abstraction has 10623 states and 26115 transitions. [2021-08-21 12:59:49,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.3548387096774195) internal successors, (104), 30 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:49,967 INFO L276 IsEmpty]: Start isEmpty. Operand 10623 states and 26115 transitions. [2021-08-21 12:59:49,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-21 12:59:49,977 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:59:49,977 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:59:50,019 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2021-08-21 12:59:50,178 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,SelfDestructingSolverStorable97 [2021-08-21 12:59:50,178 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:59:50,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:59:50,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1751060687, now seen corresponding path program 92 times [2021-08-21 12:59:50,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:59:50,178 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412622200] [2021-08-21 12:59:50,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:59:50,179 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:59:50,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:59:50,898 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:59:50,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:59:50,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412622200] [2021-08-21 12:59:50,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412622200] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:50,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619724205] [2021-08-21 12:59:50,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:59:50,898 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:59:50,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:59:50,899 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) [2021-08-21 12:59:50,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-08-21 13:00:00,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:00:00,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:00:00,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-08-21 13:00:00,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:00:02,958 INFO L354 Elim1Store]: treesize reduction 1183, result has 1.8 percent of original size [2021-08-21 13:00:02,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 0 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 105 case distinctions, treesize of input 151 treesize of output 82 [2021-08-21 13:00:02,985 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:00:02,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619724205] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:02,985 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:00:02,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20] total 31 [2021-08-21 13:00:02,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046071146] [2021-08-21 13:00:02,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-21 13:00:02,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:00:02,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-21 13:00:02,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2021-08-21 13:00:02,986 INFO L87 Difference]: Start difference. First operand 10623 states and 26115 transitions. Second operand has 32 states, 32 states have (on average 3.375) internal successors, (108), 31 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:04,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:00:04,251 INFO L93 Difference]: Finished difference Result 17159 states and 42531 transitions. [2021-08-21 13:00:04,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 13:00:04,252 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.375) internal successors, (108), 31 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-08-21 13:00:04,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:00:04,278 INFO L225 Difference]: With dead ends: 17159 [2021-08-21 13:00:04,278 INFO L226 Difference]: Without dead ends: 17071 [2021-08-21 13:00:04,279 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 1385.1ms TimeCoverageRelationStatistics Valid=271, Invalid=2591, Unknown=0, NotChecked=0, Total=2862 [2021-08-21 13:00:04,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17071 states. [2021-08-21 13:00:04,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17071 to 10479. [2021-08-21 13:00:04,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10479 states, 10478 states have (on average 2.458007253292613) internal successors, (25755), 10478 states have internal predecessors, (25755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:04,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10479 states to 10479 states and 25755 transitions. [2021-08-21 13:00:04,441 INFO L78 Accepts]: Start accepts. Automaton has 10479 states and 25755 transitions. Word has length 65 [2021-08-21 13:00:04,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:00:04,441 INFO L470 AbstractCegarLoop]: Abstraction has 10479 states and 25755 transitions. [2021-08-21 13:00:04,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.375) internal successors, (108), 31 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:04,441 INFO L276 IsEmpty]: Start isEmpty. Operand 10479 states and 25755 transitions. [2021-08-21 13:00:04,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-21 13:00:04,451 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:00:04,451 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:00:04,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2021-08-21 13:00:04,652 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,SelfDestructingSolverStorable98 [2021-08-21 13:00:04,652 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:00:04,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:00:04,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1302624049, now seen corresponding path program 93 times [2021-08-21 13:00:04,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:00:04,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964571835] [2021-08-21 13:00:04,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:00:04,653 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:00:04,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:00:05,525 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:00:05,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:00:05,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964571835] [2021-08-21 13:00:05,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964571835] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:05,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199518836] [2021-08-21 13:00:05,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:00:05,526 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:00:05,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:00:05,526 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) [2021-08-21 13:00:05,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-08-21 13:00:15,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-21 13:00:15,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:00:15,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-08-21 13:00:15,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:00:18,000 INFO L354 Elim1Store]: treesize reduction 1183, result has 1.8 percent of original size [2021-08-21 13:00:18,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 0 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 105 case distinctions, treesize of input 151 treesize of output 82 [2021-08-21 13:00:18,034 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:00:18,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199518836] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:18,034 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:00:18,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 34 [2021-08-21 13:00:18,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120537999] [2021-08-21 13:00:18,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-21 13:00:18,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:00:18,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-21 13:00:18,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1056, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 13:00:18,035 INFO L87 Difference]: Start difference. First operand 10479 states and 25755 transitions. Second operand has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-08-21 13:00:18,434 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 [2021-08-21 13:00:18,435 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-21 13:00:18,436 WARN L223 SmtUtils]: Removed 11 from assertion stack [2021-08-21 13:00:18,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 13:00:18,437 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-21 13:00:18,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2021-08-21 13:00:18,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-08-21 13:00:18,649 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (10479states) and FLOYD_HOARE automaton (currently 14 states, 35 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 35 for 5ms.. [2021-08-21 13:00:18,650 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-21 13:00:18,650 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-21 13:00:18,650 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION [2021-08-21 13:00:18,654 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-21 13:00:18,654 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-21 13:00:18,656 INFO L202 PluginConnector]: Adding new model send-receive.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 01:00:18 BasicIcfg [2021-08-21 13:00:18,656 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-21 13:00:18,656 INFO L168 Benchmark]: Toolchain (without parser) took 687738.55 ms. Allocated memory was 191.9 MB in the beginning and 2.1 GB in the end (delta: 1.9 GB). Free memory was 171.5 MB in the beginning and 710.2 MB in the end (delta: -538.7 MB). Peak memory consumption was 1.4 GB. Max. memory is 8.0 GB. [2021-08-21 13:00:18,656 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 191.9 MB. Free memory was 172.6 MB in the beginning and 172.5 MB in the end (delta: 84.8 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 13:00:18,656 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.44 ms. Allocated memory is still 191.9 MB. Free memory was 171.4 MB in the beginning and 169.9 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 13:00:18,657 INFO L168 Benchmark]: Boogie Preprocessor took 16.81 ms. Allocated memory is still 191.9 MB. Free memory was 169.9 MB in the beginning and 168.9 MB in the end (delta: 995.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-21 13:00:18,657 INFO L168 Benchmark]: RCFGBuilder took 290.84 ms. Allocated memory is still 191.9 MB. Free memory was 168.9 MB in the beginning and 155.8 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-08-21 13:00:18,657 INFO L168 Benchmark]: TraceAbstraction took 687396.75 ms. Allocated memory was 191.9 MB in the beginning and 2.1 GB in the end (delta: 1.9 GB). Free memory was 155.3 MB in the beginning and 710.2 MB in the end (delta: -554.9 MB). Peak memory consumption was 1.4 GB. Max. memory is 8.0 GB. [2021-08-21 13:00:18,657 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 0.09 ms. Allocated memory is still 191.9 MB. Free memory was 172.6 MB in the beginning and 172.5 MB in the end (delta: 84.8 kB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 25.44 ms. Allocated memory is still 191.9 MB. Free memory was 171.4 MB in the beginning and 169.9 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Preprocessor took 16.81 ms. Allocated memory is still 191.9 MB. Free memory was 169.9 MB in the beginning and 168.9 MB in the end (delta: 995.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 290.84 ms. Allocated memory is still 191.9 MB. Free memory was 168.9 MB in the beginning and 155.8 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 687396.75 ms. Allocated memory was 191.9 MB in the beginning and 2.1 GB in the end (delta: 1.9 GB). Free memory was 155.3 MB in the beginning and 710.2 MB in the end (delta: -554.9 MB). Peak memory consumption was 1.4 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - 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: 69]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (10479states) and FLOYD_HOARE automaton (currently 14 states, 35 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 35 for 5ms.. - TimeoutResultAtElement [Line: 63]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (10479states) and FLOYD_HOARE automaton (currently 14 states, 35 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 35 for 5ms.. - TimeoutResultAtElement [Line: 63]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (10479states) and FLOYD_HOARE automaton (currently 14 states, 35 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 35 for 5ms.. - 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 constructing difference of abstraction (10479states) and FLOYD_HOARE automaton (currently 14 states, 35 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 35 for 5ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 45 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 687296.2ms, OverallIterations: 100, TraceHistogramMax: 8, EmptinessCheckTime: 427.1ms, AutomataDifference: 114398.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 40.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 6732 SDtfs, 19021 SDslu, 75437 SDs, 0 SdLazy, 83252 SolverSat, 4693 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 54165.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8028 GetRequests, 3990 SyntacticMatches, 283 SemanticMatches, 3754 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42433 ImplicationChecksByTransitivity, 95242.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=10623occurred in iteration=98, InterpolantAutomatonStates: 2219, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 6122.7ms AutomataMinimizationTime, 99 MinimizatonAttempts, 289040 StatesRemovedByMinimization, 96 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 461.3ms SsaConstructionTime, 2579.6ms SatisfiabilityAnalysisTime, 165179.1ms InterpolantComputationTime, 9948 NumberOfCodeBlocks, 9948 NumberOfCodeBlocksAsserted, 479 NumberOfCheckSat, 9752 ConstructedInterpolants, 616 QuantifiedInterpolants, 281013 SizeOfPredicates, 194 NumberOfNonLiveVariables, 10911 ConjunctsInSsa, 4414 ConjunctsInUnsatCore, 196 InterpolantComputations, 5 PerfectInterpolantSequences, 1599/17809 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